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Manipulation of Topological Boundaries within a Magnetic Domain Wall 认领 引用
1
作者 Zhuyang Nie Ji Chen +6 位作者 Cunlong Dong Bin He Caihua Wan Haifeng Du Xiufeng Han Yizhou Liu Guoqiang Yu 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第5期277-292,共16页
Bloch points and transverse walls can serve as topological boundaries within a magnetic domain wall.Here,we investigate the stability and dynamics of these topological boundaries for potential spintronic applications.... Bloch points and transverse walls can serve as topological boundaries within a magnetic domain wall.Here,we investigate the stability and dynamics of these topological boundaries for potential spintronic applications.Using micromagnetic simulations,we reveal the coexistence regimes of Bloch points and transverse walls in thin films with perpendicular magnetic anisotropy.An external in-plane field enables reversible transitions between these states through boundary-mediated Bloch point nucleation and annihilation processes.Under spin-transfer torque,transverse walls exhibit transverse drift and deformation.In contrast,Bloch points move strictly along the domain wall without transverse deflection and feature a Walker breakdown threshold an order of magnitude higher than conventional domain walls.Our findings establish a device concept where binary states correspond to in-plane magnetization orientations separated by mobile topological boundaries,offering new opportunities for spintronic architectures. 展开更多
关键词 bloch points transverse walls magnetic domain wallherewe topological boundaries micromagnetic simulationswe magnetic domain walls thin films stability dynamics
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Effects of Flow Separation on Particle Dynamics in Negative Pressure Near-Wall Collection System 认领 引用
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作者 LI Xiu XU Li-xin +3 位作者 LIU Ya-jiao DOU Pei-lin HONG Zhi-chao HAN Chao-shuai 《China Ocean Engineering》 SCIE EI CSCD 2026年第1期158-168,共11页
The negative pressure near-wall particle collection method employs suction flow to circulate the medium along the inner wall of the collection port,creating flow separation that affects flow characteristics and partic... The negative pressure near-wall particle collection method employs suction flow to circulate the medium along the inner wall of the collection port,creating flow separation that affects flow characteristics and particle forces.This investigation utilizes a CFD simulation method,validated through Zhao’s experiments,and implements a“circular pipe suction model”to examine how collection port parameters-specifically wall thickness and shape-influence the flow field and particle collection efficiency across different Reynolds numbers.The findings demonstrate that wall thickness and port shape substantially affect flow separation,as evidenced by recirculation zones that compress the flow and modify the particle force coefficient.Typically,greater wall thickness results in decreased particle force coefficients,with variations up to 15%.Moreover,collection ports with inward-pointing sharp angles demonstrate the highest particle force coefficients,while those with outward-pointing angles show the lowest,exhibiting variations up to 23%.These results indicate that optimizing collection port design through wall thickness and shape modifications can improve particle collection efficiency,enhancing practical applications. 展开更多
关键词 negative pressure near-wall collection system flow separation collection head wall thickness collection head collection port shape
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Study on the Motion Characteristics of Floating Bubbles near the Wall Based on OpenFOAM 认领 引用 被引量：1
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作者 Jie Cui Tao Xia +2 位作者 Zhaoyu Qu Xin Chen Mingyuan Li 《哈尔滨工程大学学报（英文版）》 CSCD 2026年第1期32-45,共14页
In this study,the dynamic characteristics of microscale floating bubbles near the vertical wall are studied.This occurrence is common in industrial and natural phenomena.Although many studies have been conducted on mi... In this study,the dynamic characteristics of microscale floating bubbles near the vertical wall are studied.This occurrence is common in industrial and natural phenomena.Although many studies have been conducted on microscale bubbles,few studies investigate floating bubbles with very small Reynolds number(Re)near the wall,which is the main research goal of this study.Therefore,this study establishes a model for the ascent of small-scale bubbles near a vertical wall using the interFoam solver in OpenFOAM.This study investigates the influences of diverse viscosity parameters,varying distances from the wall,and different gas flow rates on the terminal velocity,deformation,and motion trajectory of bubbles.The results reveal that as liquid viscosity increases,the Re of bubbles gradually decreases and reaches a minimum of 0.012,which is similar to the Re of micrometer-sized bubbles in water.The characteristics of the wall-induced force in the longitudinal direction are closely related to the changes in liquid viscosity.Under low-viscosity conditions,the induced lift is the principal form of action,whereas under high-viscosity conditions,it is primarily manifested as induced drag. 展开更多
关键词 Rising bubble Viscosity Low Reynolds number Near wall bubbles OpenFOAM
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One-dimensional charged domain walls in fluorite ferroelectrics 认领 引用
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作者 Jiajia Chen Haoji Qian +3 位作者 Xiaoxi Li Yan Liu Chengji Jin Genquan Han 《Journal of Semiconductors》 EI CAS CSCD 2026年第5期23-27,共5页
Ferroelectric domain walls are conventionally regarded as two-dimensional(2D)interfacial objects that separate regions of different polarization within a crystal.This picture has guided decades of research into polari... Ferroelectric domain walls are conventionally regarded as two-dimensional(2D)interfacial objects that separate regions of different polarization within a crystal.This picture has guided decades of research into polarization switching,domain evolution,and ferroic functionality. 展开更多
关键词 domain walls ferroic functionality separate regions different polarization one dimensional polarization switching ferroelectric domain walls charged polarization switchingdomain
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Seismic design and performance of building structures with self-centering steel-concrete hybrid single-pier coupled walls 认领 引用
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作者 Mojtaba Farahi Fabio Freddi Massimo Latour 《Resilient Cities and Structures》 EI CSCD 2026年第1期85-101,共17页
In response to the demand for seismic-resilient structures,various innovative solutions have emerged to reduce local damage and residual deformations,facilitating repair operations in the aftermath of high-intensity e... In response to the demand for seismic-resilient structures,various innovative solutions have emerged to reduce local damage and residual deformations,facilitating repair operations in the aftermath of high-intensity earth-quakes.This paper examines the seismic performance of a steel-concrete hybrid wall system equipped with a selfcentering solution to mitigate earthquake-induced residual deformations.The considered hybrid system includes a Reinforced Concrete(RC)shear wall with two steel side columns connected by coupling steel beams.In this study,a novel type of coupling beams featuring a friction-damped self-centering system is implemented.The system is referred to as Self-Centering Hybrid Single-Pier Coupled Wall(SC-SP-HCW)and aims to minimize damage and residual deformations after earthquakes,which in turn facilitates repairs and enhances seismic resilience.Unlike conventional self-centering coupling beams with post-tensioned tendons,the self-centering configuration in this system does not rely on a gap-opening mechanism at the wall-beam connection interface,eliminating frame expansion effects.The proposed self-centering devices can also be implemented as preassembled links,which facilitates installation and reduces uncertainties associated with the on-site posttensioning procedure.The seismic performance of SC-SP-HCWs is investigated through nonlinear static and incremental dynamic analyses on case study SC-SP-HCWs designed as the lateral load-resisting systems of an eight-story building.The seismic response of the case study SC-SP-HCWs is investigated,considering both local and global engineering demand parameters(EDPs).The results demonstrate the ability of the SC-SP-HCWs to significantly reduce earthquake-induced residual deformations without exacerbating damage to structural ele-ments typically observed in conventional coupled walls. 展开更多
关键词 Hybrid coupled walls Damage-free self-centering links Friction devices Seismic performance Reinforced concrete walls
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Quick evaluation method of rock damage depth in intermediate walls subjected to closely-spaced cavern blasting 认领 引用
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作者 Xudong Jiang Guoyuan Peng +3 位作者 Ke Lu Xingtao Ren Yang Zhao Xiaomu Liao 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第6期330-347,共18页
During the construction of underground caverns,the rock masses of intermediate wall between closelyspaced caverns are easy to be destroyed due to excessive blast-induced damage.Limited to the current measurement techn... During the construction of underground caverns,the rock masses of intermediate wall between closelyspaced caverns are easy to be destroyed due to excessive blast-induced damage.Limited to the current measurement technology,we cannot achieve rapid assessment of the rock damage,making it difficult to realize real-time adjustments to the blast design.Given that the blast vibration is relatively easy to acquire,the study establishes a correlation between the peak particle velocity(PPV)and the damage depth within the intermediate wall.A field measurement of the blast vibration was conducted in a scenario of excavating closely-spaced caverns.A dynamic finite element model was thereafter established and loaded via the equivalent elastic boundary(EEB)method.The model was verified based on the measurement data of blast vibration,together with an appropriate load amplification coefficient.Then,a series of small dimensional models with single-borehole were created to obtain the rock damage extent under various charge quantity in the near-blast area,while a large dimensional EEB model was applied to capture the PPV distribution in the far-field of blasting under the corresponding charge quantities.Finally,the blast-induced damage depth of the intermediate wall and the PPV at a certain blast center distance were correlated by the charge quantity.The relationships between PPV and damage depth at different blast center distance were fitted.The results indicate that deploying vibration monitoring at about 40 m or 50 m from the blasting face can estimate in advance the damage depth of intermediate wall,which can help provide some guidance to the blast of closely-spaced caverns. 展开更多
关键词 Closely-spaced caverns Intermediate wall Blast-induced damage Blast vibration Peak particle velocity
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Guanidinium-Based Covalent Organic Frameworks via Pore Wall Regulation:Efficient Selective Palladium Recovery From Metallurgical Wastewater 认领 引用
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作者 Jiaxing Xiong Changhao Liang +7 位作者 Zhuang Yang Chuntang Liu Mingzhu Dai Rifang Qiu Xian Yuan Fengzhi Jiang Shixiong Wang Xiangjun Yang 《Rare Metals》 SCIE EI CAS CSCD 2026年第5期418-432,共15页
Recovering palladium(Pd)from low-concentration metallurgical wastewater still poses significant challenges.In this study,triaminoguanidine hydrochloride was used as the key functional site,and three guanidine-function... Recovering palladium(Pd)from low-concentration metallurgical wastewater still poses significant challenges.In this study,triaminoguanidine hydrochloride was used as the key functional site,and three guanidine-functionalized covalent organic frameworks(GCOFs)were successfully constructed by adjusting the substituents(-H,-OH,and-OCH3)on terephthalaldehyde molecules,and their extraction performance towards palladium was explored.First,multiple characterization techniques,including scanning electron microscopy,zeta potential analysis,and contact angle measurement,were employed to systematically investigate the regulatory rules of substituents on the physicochemical properties of GCOFs,such as their micromorphology,surface potential,and hydrophilicity.Second,static adsorption experiments were conducted to systematically study the adsorption behavior of GCOFs with different substituents toward Pd(Ⅱ),and the maximum sorption capacity of COF-H is up to 180 mg g-1.Furthermore,this study successfully fabricated GCOFs into aerogels by means of freeze-drying technology and conducted dynamic adsorption experiments with actual metallurgical wastewater.Specifically,70.0 mg of COF-H/aerogel is capable of continuously treating 12.5 L of metallurgical wastewater.In conclusion,by regulating the types of substituents,this study clarified the influence rules of substituent effects on the Pd(Ⅱ)adsorption performance of GCOFs in metallurgical wastewater.The developed GCOFs/aerogels hold broad application potential in the fields of precious metal resource recovery and environmental protection. 展开更多
关键词 COFs Guanidinium functionalization metallurgical wastewater Pd(II)recovery pore wall regulation
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Cotton fiber length was shortened under high temperature by inhibition of cell wall loosening and acceleration of secondary wall synthesis 认领 引用
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作者 Liuyan Yang Manli Zhao +5 位作者 Wenting Tang Wei Hu Zhiguo Zhou Baiqing Chen Qiuxiang Tang Wenqing Zhao 《The Crop Journal》 SCIE CSCD 2026年第3期821-834,共14页
To determine how high temperature(HT)impairs cotton fiber elongation,greenhouse experiments compared two temperature regimes(CT,28℃HT,38℃)for 12 d.The findings indicated that compared with CT,the fiber elongation ra... To determine how high temperature(HT)impairs cotton fiber elongation,greenhouse experiments compared two temperature regimes(CT,28℃HT,38℃)for 12 d.The findings indicated that compared with CT,the fiber elongation rate initially increased during HT(0-8 d),but subsequently decreased,resulting in a significant decrease in cotton fiber length at harvest.At 3 and 6 d under HT,cell turgor pressure increased;additionally,the auxin and ethylene content in fiber significantly increased,promoting cell wall loosening and increasing elongation rate through regulating xyloglucan endoglycosyltransferases/hydrolases and expansin.At 12 d under HT,cellulose and hemicellulose decomposition were inhibited in fiber,which hindered cell wall loosening and restricted fiber elongation.Meanwhile,the lipid and callose content in fiber was increased,and the enhanced abscisic acid and H2O2content promoted lignin synthesis by up-regulating the expression of WLIM1a gene.Both changes accelerated the initiation of secondary wall synthesis.Consequently,the transition stage that coincides with fiber elongation and secondary wall thickening was reduced by 0.3-0.5 d,leading to a decrease in fiber length.In summary,fiber length was reduced under HT,accompanied by restricted cell wall loosening and accelerated secondary wall synthesis. 展开更多
关键词 Cotton(Gossypiumhirsutum L.) High temperature Fiber elongation Secondary wall synthesis
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Failure mechanism of the coal wall at the working face based on an eccentric compression mechanical model 认领 引用
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作者 Maolin Tian Jiabao Wang +4 位作者 Changsheng Wang Shijie Sun Lijun Han Qingbin Meng Sunhao Zhang 《Deep Underground Science and Engineering》 EI CAS CSCD 2026年第1期127-143,共17页
The deformation and failure of coal walls in front of a working face cause significant difficulties during mining operations.This study reveals the nonuniform distribution of bearing pressure in front of coal walls ba... The deformation and failure of coal walls in front of a working face cause significant difficulties during mining operations.This study reveals the nonuniform distribution of bearing pressure in front of coal walls based on in situ monitoring data and numerical simulation.Therefore,an eccentric compression mechanical model was established to study the deformation and failure characteristics of a coal wall.The slenderness ratio of the compression bar is introduced to define coal walls.The results showed that instability failure occurs when λ>λc and material failure occurs when λ≤λc.The instability failure-type coal wall spalling was related to the mining height,eccentricity of roof pressure,the horizontal force,and the reaction moment of the floor.The material failure-type coal wall spalling was related to the cohesion,the internal friction angle of the coal,the upper pressure,and the horizontal force of coal walls.Unstable and destructive coal wall peeling usually occurs at a height of 0.5–0.6 times the mining height,while material damage to coal wall peeling is determined to occur within the range of 0.4-0.6 times the mining depth.The findings contribute to the understanding of the deformation and failure of coal walls. 展开更多
关键词 coal wall spalling eccentric compression mechanical model failure mechanism instability failure shear failure
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Deflection of foundation pit retaining wall in heterogeneous soil strata:Intelligent prediction methods based on physics-informed machine learning 认领 引用
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作者 Cong Zhou Lei He +3 位作者 Junchen He Yi Zhang Huaiguang Xiao Chee Kiong Soh 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第5期4007-4022,共16页
Excavation-induced retaining wall deflection(RWD)significantly influences the safety of surrounding built environment.To predict the three-dimensional RWD in heterogeneous strata,a new partial differential equation(PD... Excavation-induced retaining wall deflection(RWD)significantly influences the safety of surrounding built environment.To predict the three-dimensional RWD in heterogeneous strata,a new partial differential equation(PDE)is derived in this study,and two prediction models are proposed,i.e.the physics-informed neural network(PINN)model and the data-driven PINN model.As a physical constraint,the new PDE is crucial to the loss functions of these models.Then,the validity of the models is verified and analysed using a subway deep-foundation pit.The results show that the training times of both models are controlled within 900 s,which is a significant reduction compared to that of the conventional numerical model.In addition,the prediction accuracy of the data-driven PINN model is higher than that of the numerical model,while that of the PINN model is slightly lower than that of the numerical simulation.However,in contrast to the data-driven PINN model,the PINN model can identify irregular soil interfaces in heterogeneous strata to learn the deflection continuity conditions at irregular interfaces and realize RWD prediction in non-uniform distributed strata.In practical applications in foundation pit engineering,the selection of the PINN and data-driven PINN models can be conducted according to the in situ distribution conditions of the strata to enable the early prediction of potential RWD,thereby providing a reliable basis for the further optimisation of retaining structures design. 展开更多
关键词 Heterogeneous soil strata Braced excavation Retaining wall deflection(RWD) Soil-structure interaction Physics-informed neural networks(PINNs)
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Wall Thickness Homogenization Control and Performance of Superplastically Formed Hemispherical Shell of TC4 Titanium Alloy 认领 引用
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作者 Ji Wei Zhang Zhaohuang +3 位作者 Lu Zichuan Wei Shi Qiu Xuyangfan Zhang Xuhu 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2026年第7期1683-1691,共9页
Spherical and capsule-shaped surface tension tanks are widely used in satellite,spacecraft,and other fields due to their advantages of lightweight structure,high efficiency,and high reliability.With the advancement of... Spherical and capsule-shaped surface tension tanks are widely used in satellite,spacecraft,and other fields due to their advantages of lightweight structure,high efficiency,and high reliability.With the advancement of space exploration,the demands for thinner walls,more complex structures,and uniform overall performance in the hemispherical shells of these tanks present significant challenges for hemispherical shell forming technique.A hemispherical shell with uniform wall thickness was prepared using the rapid direct-and-reverse superplastic forming method.Results reveal that the properties and microstructure of each section of the formed hemisphere shell are consistent with those of the initial plate,and the overall shell thickness is highly uniform. 展开更多
关键词 hemispherical shell of storage tank control of wall thickness direct-and-reverse superplastic forming mold design
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Zigzag domain walls unravel the polarization switching puzzle in wurtzite ferroelectrics 认领 引用
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作者 Hang Zang Zhiming Shi +1 位作者 Xiaojuan Sun Dabing Li 《Journal of Semiconductors》 EI CAS CSCD 2026年第6期33-36,共4页
In the past decade,the discovery of robust ferroelectricity in scandium-doped aluminum nitride(Al1−xScxN)[1]has ignited a new wave of research in the semiconductor community.Unlike traditional perovskite ferroel... In the past decade,the discovery of robust ferroelectricity in scandium-doped aluminum nitride(Al1−xScxN)[1]has ignited a new wave of research in the semiconductor community.Unlike traditional perovskite ferroelectrics(such as PbZrTiO3 or PZT)[2],wurtzite-structured materials are fully compatible with modern CMOS fabrication processes[3]. 展开更多
关键词 cmos fabrication processes zigzag domain walls scandium doped aluminum nitride wurtzite ferroelectrics semiconductor community robust ferroelectricity perovskite ferroelectrics such polarization switching
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Gaussian Process Regression-Based Optimization of Fan-Shaped Film Cooling Holes on Concave Walls 认领 引用
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作者 Yanzhao Yang Xiaowen Song +1 位作者 Zhiying Deng Jianyang Yu 《Fluid Dynamics & Materials Processing》 EI 2026年第1期154-172,共19页
In this study,a Gaussian Process Regression(GPR)surrogate model coupled with a Bayesian optimization algorithm was employed for the single-objective design optimization of fan-shaped film cooling holes on a concave wa... In this study,a Gaussian Process Regression(GPR)surrogate model coupled with a Bayesian optimization algorithm was employed for the single-objective design optimization of fan-shaped film cooling holes on a concave wall.Fan-shaped holes,commonly used in gas turbines and aerospace applications,flare toward the exit to form a protective cooling film over hot surfaces,enhancing thermal protection compared to cylindrical holes.An initial hole configuration was used to improve adiabatic cooling efficiency.Design variables included the hole injection angle,forward expansion angle,lateral expansion angle,and aperture ratio,while the objective function was the average adiabatic cooling efficiency of the concave wall surface.Optimization was performed at two representative blowing ratios,M=1.0 and M=1.5,using the GPR-based surrogate model to accelerate exploration,with the Bayesian algorithm identifying optimal configurations.Results indicate that the optimized fan-shaped holes increased cooling efficiency by 15.2%and 12.3%at low and high blowing ratios,respectively.Analysis of flow and thermal fields further revealed how the optimized geometry influenced coolant distribution and heat transfer,providing insight into the mechanisms driving the improved cooling performance. 展开更多
关键词 The concave wall film cooling holes GPR adiabatic cooling efficiency geometry optimization
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The molecular and hormonal regulation of cotton fiber development:from single‑cell initiation to secondary wall thickening 认领 引用
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作者 LIU Zhixin QIN Aizhi +6 位作者 LONG Jiani FAN Xiaoli LIAO Mengyu WANG Baozhen ZHANG Yinpeng KANG Wenxuan SUN Xuwu 《Journal of Cotton Research》 CAS CSCD 2026年第2期290-306,共17页
Cotton fiber provides an exceptional model system for studying plant cell differentiation,elongation,and cell wall biogenesis.Recent advances in genomics,single-cell transcriptomics,genome editing,and multi-omics appr... Cotton fiber provides an exceptional model system for studying plant cell differentiation,elongation,and cell wall biogenesis.Recent advances in genomics,single-cell transcriptomics,genome editing,and multi-omics approaches have dramatically expanded our understanding of the molecular networks governing cotton fiber development.This review synthesizes current knowledge on the transcriptional,hormonal,epigenetic,and metabolic regulation of fiber initiation,elongation,and secondary cell wall(SCW)formation.We highlight the central roles of key transcription factors families—including MYB,HD-ZIP,bHLH,and NAC—in coordinating fiber cell fate determination and morphogenesis.We further discuss how phytohormones such as auxin,gibberellins,brassinosteroids,and strigolactones interact to regulate fiber elongation and SCW deposition.Emerging evidence also indicates that epigenetic mechanisms,including chromatin accessibility and RNA methylation,contribute to the fine-tuning of stage-specific gene expression.Furthermore,we explore how cytoskeletal dynamics and lipid metabolism contribute to polarized cell growth.Finally,we assess the potential of CRISPR-Cas9-mediated gene editing for cotton fiber improvement and propose future research directions aimed at bridging knowledge gaps between molecular mechanisms and agronomic traits.Despite these advances,several knowledge gaps remain,including the precise integration of hormonal hierarchies,the functional validation of predicted regulatory modules in polyploid cotton,and the translational feasibility of gene editing for fiber quality improvement under field conditions. 展开更多
关键词 Cotton fiber Transcription factor Phytohormone signaling Single-cell RNA-seq Chromatin accessibility CRISPR-Cas9 Secondary cell wall Fiber elongation
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Wave Energy System Combined by a Heaving Box and a Perforated Flexible Membrane Wall 认领 引用
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作者 Sarat Chandra Mohapatra C.Guedes Soares 《哈尔滨工程大学学报（英文版）》 CSCD 2026年第1期110-121,共12页
An analytical model of a floating heaving box integrated with a vertical flexible porous membrane placed right next to the box applications to wave energy extraction and breakwater systems is developed under the reduc... An analytical model of a floating heaving box integrated with a vertical flexible porous membrane placed right next to the box applications to wave energy extraction and breakwater systems is developed under the reduced wave equation.The theoretical solutions for the heave radiating potential to the assigned physical model in the corresponding zones are attained by using the separation of variables approach along with the Fourier expansion.Applying the matching eigenfunction expansion technique and orthogonal conditions,the unknown coefficients that are involved in the radiated potentials are determined.The attained radiation potential allows the computation of hydrodynamic coefficients of the heaving buoy,Power Take-Off damping,and wave quantities.The accuracy of the analytical solution for the hydrodynamic coefficients is demonstrated for different oblique angles with varying numbers of terms in the series solution.The current analytical analysis findings are confirmed by existing published numerical boundary element method simulations.Several numerical results of the hydrodynamic coefficients,power capture,power take-off optimal damping,and transmission coefficients for numerous structural and physical aspects are conducted.It has been noted that the ideal power take-off damping increases as the angle of incidence rises,and the analysis suggests that the ability to capture waves is more effective in shallower waters compared to deeper ones. 展开更多
关键词 Analytical model Heaving buoy Flexible membrane perforated wall Boundary element method code Power take-off Power capture
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Non-equilibrium wall stress model for large eddy simulation of shock wave-boundary layer interaction 认领 引用
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作者 Tian Wang Qilong Guo +2 位作者 Hongmin Su Xianxu Yuan Chunguang Xu 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2026年第7期281-296,共16页
Wall-modeled large eddy simulation is a practical turbulence simulation approach that balances computational efficiency and accuracy for the shock wave/boundary layer interaction(SWBLI).Commonly used equilibrium wall ... Wall-modeled large eddy simulation is a practical turbulence simulation approach that balances computational efficiency and accuracy for the shock wave/boundary layer interaction(SWBLI).Commonly used equilibrium wall stress models neglect the influences of the pressure gradient,which may lead to significant prediction errors in non-equilibrium flows.In this study,we develop a modeling framework for non-equilibrium wall stress models and establish a non-equilibrium wall stress model that incorporates pressure gradient,compressibility,and wall heat transfer effects.A priori analysis using high-fidelity data of the SWBLI reveals that the velocity profile at the reattachment point deviates from the velocity law considering pressure gradient,overpredicting the scale of the separation region.Therefore,we propose a novel separation indicator to improve the prediction accuracy of the non-equilibrium wall stress model in separation flows.The non-equilibrium model with this separation indicator is validated in the compressible turbulent boundary layer and SWBLI cases.All the results demonstrate that the present model indeed provides a more accurate wall shear stress and can capture the flow field accurately. 展开更多
关键词 Non-equilibrium Wall stress model SWBLI Separation indicator
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Tolerance-constrained inverse design of ceramic core configuration for precision wall thickness control in hollow turbine blades 认领 引用
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作者 Zi-chun Wang Wen-hu Wang +3 位作者 Kang Cui Rui-song Jiang Rui-zhe Dong Yuan-bin Wang 《China Foundry》 SCIE EI CAS CSCD 2026年第4期599-612,共14页
Wall thickness deviation significantly diminishes the durability and efficiency of turbine blades.It primarily results from surface deformation and positional shifts of the ceramic core during casting,which disrupts c... Wall thickness deviation significantly diminishes the durability and efficiency of turbine blades.It primarily results from surface deformation and positional shifts of the ceramic core during casting,which disrupts core-shell alignment.A novel reverse adjustment method for ceramic core positions within turbine blades based on the measurement of a batch of blades was proposed in this work.Initially,the optimal position solution model for internal ceramic cores of turbine blades on the basis of industrial computed tomography(ICT)scanning was established.Subsequently,a reverse adjustment method was developed to optimize the position and orientation of ceramic cores within the blade interior.The proposed method was verified through casting experiments,revealing a reduction of 45.5%in the maximum wall thickness error of the adjusted blades compared to their initial condition.The wall thickness error at the leading and trailing edges of the blade is reduced to less than±0.15 mm,while the wall thickness error on the concave and convex surfaces is minimized to less than±0.2 mm,which essentially satisfies the prescribed wall thickness tolerance requirements.The process system for precise shape control of hollow turbine blade wall thickness is further refined,providing robust technical support for enhancing the conformity rate of hollow turbine blade wall thickness dimensions. 展开更多
关键词 hollow turbine blade tolerance-constrained wall thickness control reverse adjustment model alignment
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Ultra-Strong,Fire-Resistant and Eco-Friendly Bamboo Composites Based on Cell Wall Polymer Decoration Engineering 认领 引用
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作者 Jiajian Wang Yanmei Li +7 位作者 Tongda Liu Weibing Xue Hongxing Yang Chunyan Yin Rong Liu Guanben Du Wenshuai Chen Long Yang 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2026年第1期478-490,共13页
Biomass structural materials can effectively address the issues of high energy consumption and environmental degradation brought by traditional engineering structural materials.However,natural structural materials oft... Biomass structural materials can effectively address the issues of high energy consumption and environmental degradation brought by traditional engineering structural materials.However,natural structural materials often suffer from drawbacks such as low mechanical performance and flammability.Therefore,this study has developed an ultra-strong fire-resistant bamboo composite(UFBC).Natural bamboo(NB)was used as the raw material.After delignification treatment,bamboo fibers are grafted with epoxy groups through in-situ chemical bonding.Subsequently,polymer chains underwent in-situ chemical cross-linking within the bamboo fiber framework,combined with reinforcement from nano silica,resulting in strengthened cell walls.In addition,the softened and expanded cell walls can facilitate the deposition of phosphate and borate salt on the cell walls,forming an N-P-B flame-retardant system within the system.The tensile strength(463 MPa vs NB 112 MPa)and flexural strength(655 MPa vs NB 157 MPa)of UFBC increased fourfold,with a Limiting Oxygen Index(LOI)of 54.4%.Compared to similar bamboo-based composite materials,UFBC exhibits superior environmental friendliness and sustainability throughout its lifecycle,with all 18 environmental factors being optimized(up to a 92%reduction).This study provides an important reference for the application of high-performance biomass structural materials in construction and industry. 展开更多
关键词 bamboo composites cell wall modification environmental benefit flame retardancy mechanical strength
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Novel intensification strategy for the liquid-only transfer dividing wall column separating ternary mixtures based on the column grand composite curve 认领 引用
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作者 Zhongwen Song Chenghao Xing +1 位作者 Yanyang Wu Guilian Liu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2026年第1期334-352,共19页
The liquid-only transfer dividing wall column(LDWC)offers a promising path for industrializing dividing wall columns by simplifying vapor split control.However,their energy efficiency is insufficient due to the additi... The liquid-only transfer dividing wall column(LDWC)offers a promising path for industrializing dividing wall columns by simplifying vapor split control.However,their energy efficiency is insufficient due to the addition of heat at the bottom and its removal at the top.Therefore,developing an effective strategy to enhance the energy efficiency of the entire LDWC system is crucial.This work investigates the intensification of LDWC based on the column grand composite curve(CGCC)and thermodynamic analysis,proposing a novel intensification strategy to improve energy efficiency effectively.An optimization model with four blocks is developed to minimize the total annual cost(TAC)of the intensified LDWC.Energy,exergy,economic,and environmental analyses are used to evaluate its performance.Ternary mixtures with different easy separation indexes(ESI)are selected as illustrative examples.For mixtures with ESI≤1,the optimal configuration involves partial feed preheating,compressors and intermediate reboilers on both side sections,along with optimized operating pressure.This setup leads to significant reductions in total energy consumption,TAC,and gas emissions by 43.80%,28.08%,and 42.85%for ESI=1,and by 46.17%,29.06%,and 45.35%for ESI1,the best performance is achieved by implementing partial feed preheating and modifications only to the right section.This results in reductions of 21.64%in energy consumption,16.26%in TAC,and 21.51%in gas emissions when compared to CDS.In all cases,the optimal configurations show the lowest lost work and minimum work,indicating an improved thermodynamic performance. 展开更多
关键词 Dividing wall column Intensification Vapor recompression Intermediate reboiler Optimization
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Engineering nonreciprocal damping and polarization of spin waves in ferromagnetic domain wall via Dzyaloshinskii-Moriya interaction and spin-transfer torque 认领 引用
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作者 Xiang Liu Xiguang Wang +2 位作者 Zhixiong Li Xiufeng Han Guanghua Guo 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第4期29-35,共7页
Manipulation of spin-wave polarization is fundamental for designing novel magnonic devices based on the polarization coding technique.Here,we demonstrate the generation of left-handed polarized spin waves(LPSWs)in a f... Manipulation of spin-wave polarization is fundamental for designing novel magnonic devices based on the polarization coding technique.Here,we demonstrate the generation of left-handed polarized spin waves(LPSWs)in a ferromagnetic domain wall and their polarization modulation through the combined effect of the Dzyaloshinskii-Moriya interaction(DMI)and spin-polarized electric current.A phase diagram delineating the stability regions of left-and right-handed polarized spin waves(RPSWs)is constructed as a function of DMI strength and current density.Our results reveal a pronounced DMI-induced nonreciprocal damping effect,predominantly manifested in RPSWs while leaving LPSWs largely unaffected.This phenomenon enables effective filtering of RPSWs in one direction,allowing the realization of pure LPSW propagation as well as elliptically polarized spin waves with tunable eccentricity.Our work provides a viable method for controlling spin-wave polarization and nonreciprocal propagation in ferromagnetic systems. 展开更多
关键词 spin wave Dzyaloshinskii–Moriya interaction spin-polarized electric current ferromagnetic domain wall
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