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Magnetic Behaviour and Heating Effect of Fe3O4 Ferrofluids Composed of Monodisperse Nanoparticles 认领 引用 被引量：4
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作者 张丽英 窦永华 +1 位作者 张玲 古宏晨 《Chinese Physics Letters》 SCIE EI CAS 2007年第2期483-486,共4页
Fe3O4 ferrofluids containing monodisperse Fe3O4 nanoparticles with different diameters of 8, 12, 16 and 18nm are prepared by using high-temperature solution phase reaction. The particles have single crystal structures... Fe3O4 ferrofluids containing monodisperse Fe3O4 nanoparticles with different diameters of 8, 12, 16 and 18nm are prepared by using high-temperature solution phase reaction. The particles have single crystal structures with narrow size distributions. At room temperature, the 8-nm ferrofluid shows superparamagnetic behaviour, whereas the others display hysteresis properties and the coercivity increases with the increasing particle size. The spin glass-like behaviour and cusps near 190K are observed on all ferrofluids according to the temperature variation of field-cooled （FC） and zero-field-cooled （ZFC） magnetization measurements. The cusps are found to be associated with the freezing point of the solvent. As a comparison, the ferrofluids are dried and the FC and ZFC magnetization curves of powdery samples are also investigated. It is found that the blocking temperatures for the powdery samples are higher than those for their corresponding ferrofluids. Moreover, the size dependent heating effect of the ferrofluids is also investigated in ac magnetic field with a frequency of 55 kHz and amplitude of 200 Oe. 展开更多
关键词 SUPERPARAMAGNETIC NANOPARTICLES FLUID HYPERTHERMIA PARTICLES FIELD ENHANCEMENT SYSTEM
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Impact of Pollutant Concentration and Particle Deposition on the Radiative Flow of Casson-Micropolar Fluid between Parallel Plates 认领 引用 被引量：1
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作者 Ghaliah Alhamzi Badr Saad T.Alkahtani +2 位作者 Ravi Shanker Dubey Vinutha Kalleshachar Neelima Nizampatnam 《Computer Modeling in Engineering & Sciences》 SCIE EI 2025年第1期665-690,共26页
Assessing the behaviour and concentration of waste pollutants deposited between two parallel plates is essential for effective environmental management.Determining the effectiveness of treatment methods in reducing po... Assessing the behaviour and concentration of waste pollutants deposited between two parallel plates is essential for effective environmental management.Determining the effectiveness of treatment methods in reducing pollution scales is made easier by analysing waste discharge concentrations.The waste discharge concentration analysis is useful for assessing how effectively wastewater treatment techniques reduce pollution levels.This study aims to explore the Casson micropolar fluid flow through two parallel plates with the influence of pollutant concentration and thermophoretic particle deposition.To explore the mass and heat transport features,thermophoretic particle deposition and thermal radiation are considered.The governing equations are transformed into ordinary differential equations with the help of suitable similarity transformations.The Runge-Kutta-Fehlberg’s fourthfifth order technique and shooting procedure are used to solve the reduced set of equations and boundary conditions.The integration of a neural network model based on the Levenberg-Marquardt algorithm serves to improve the accuracy of predictions and optimize the analysis of parameters.Graphical outcomes are displayed to analyze the characteristics of the relevant dimensionless parameters in the current problem.Results reveal that concentration upsurges as the micropolar parameter increases.The concentration reduces with an upsurge in the thermophoretic parameter.An upsurge in the external pollutant source variation and the local pollutant external source parameters enhances mass transport.The surface drag force declines for improved values of porosity and micropolar parameters. 展开更多
关键词 Micropolar fluid thermal radiation porous medium thermophoretic particle deposition waste discharge concentration
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Dissipative Particle Dynamics Simulations of Domain Growth and Phase Separation in Binary Immiscible Fluids 认领 引用 被引量：3
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作者 Ying Zhao Hong Liu +1 位作者 Zhong-yuan Lu Chia-chung Sun 《Chinese Journal of Chemical Physics》 SCIE EI CAS 北大核心 2008年第5期451-456,共6页
It was investigated that the domain growth processes of spinodal decomposition with different quenching depth in two and three dimensional binary immiscible fluids by using parallel dissipative particle dynamics simul... It was investigated that the domain growth processes of spinodal decomposition with different quenching depth in two and three dimensional binary immiscible fluids by using parallel dissipative particle dynamics simulations. In two dimensions, the dynamic scaling exponent 1/2 for coalescence and 2/3 for inertial regimes in the shallow quench and strong finite size effects in the cases of deep quenching were obtained. In three dimensions, it was used that the diffusive regime with exponent n=l/3 in the shallow quench and the inertial hydrodynamic regime with n=2/3 for different quenches. The viscous effects are not clearly reflected, showing n=1/2 in both shallow and deep quenches in this time period, due to the soft nature of interaction potential adopted in dissipative particle dynamics. 展开更多
关键词 Dissipative particle dynamics Binary immiscible fluids Domain growth
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Properties of magneto-rheological fluids based on amorphous micro-particles 认领 引用 被引量：2
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作者 董旭峰 马宁 +3 位作者 齐民 李金海 关新春 欧进萍 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第12期2979-2983,共5页
To improve the magneto-rheological (MR) properties of magneto-rheological fluids, self-made amorphous alloy particles, the composition of which was Fe76Cr2Mo2Sn2P10B2C2Si4, were used as the disperse phase to replace t... To improve the magneto-rheological (MR) properties of magneto-rheological fluids, self-made amorphous alloy particles, the composition of which was Fe76Cr2Mo2Sn2P10B2C2Si4, were used as the disperse phase to replace traditional carbonyl iron (CI) particles to prepare amorphous based magneto-rheological fluid (AMRF). Soft magnetic properties and densities of the amorphous particles and the CI particles were tested and compared. The results indicate the amorphous particles present a lower density but larger magnetization intensity and larger permeability at lower field levels. Properties of the AMRF with 20% particles in volume fraction were tested and compared with the CI based MR fluid (CMRF). The AMRF presents a saturation yield stress of 41 kPa at ~227 kA/m and a sedimentation ratio of 80%. The results indicate the magneto-rheological fluid based on amorphous micro-particles has better MR properties and sedimentation stability than that based on CI particles at lower field levels (0-200 kA/m). 展开更多
关键词 magneto-rheological fluids amorphous particles carbonyl iron soft magnetic properties microstructure
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Duality and stability analysis of biomagnetic fluid flow and heat transfer with magnetic particles along a shrinking cylinder in presence of magnetic dipole 认领 引用
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作者 Jahangir Alam M.G.Murtaza +1 位作者 Efstratios Tzirtzilakis Mohammad Ferdows 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2025年第3期581-601,共21页
In the present study,we concentrate on finding the dual solutions of biomagnetic fluid namely blood flow and heat transfer along with magnetic particles over a two dimensional shrinking cylinder in the presence of a m... In the present study,we concentrate on finding the dual solutions of biomagnetic fluid namely blood flow and heat transfer along with magnetic particles over a two dimensional shrinking cylinder in the presence of a magnetic dipole.To make the results physically realistic,stability analysis is also carried out in this study so that we realized which solution is stable and which is not.The governing partial equations are converted into ordinary differential equations by using similarity transformations and the numerical solution is calculated by applying bvp4c function technique in MATLAB software.The effects of different physical parameters are plotted graphically and discussed according to the outcomes of results.From the present study we observe that ferromagnetic interaction parameter had a great influenced on fluid velocity and temperature distributions.It is also found from the current analysis that the first and second solutions of shrinking cylinder obtained only when we applied particular ranges values of suction parameter.The most important characteristics part of study is to analyze the skin friction coefficient and rate of heat transfer which also covered in this analysis.It reveals that both skin friction coefficient and rate of heat transfer are reduced with rising values of ferromagnetic number.A comparison has also been made to make the solution feasible. 展开更多
关键词 dual solutions stability analysis biomagnetic fluid blood magnetic particles shrinking cylinder magnetic dipole
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Laboratory investigation of high-temperature preformed particle gels for fluid control in granite cores for geothermal applications 认领 引用
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作者 DARKO K Caleb LIU Yanbo +2 位作者 SCHUMAN Thomas WEI Mingzhen BAI Baojun 《Petroleum Exploration and Development》 SCIE 2025年第5期1378-1388,共11页
To understand the applicability of high-temperature preformed particle gel(HT-PPG)for control of short-circuiting in enhanced geothermal systems(EGSs),core flooding experiments were conducted on fractured granite core... To understand the applicability of high-temperature preformed particle gel(HT-PPG)for control of short-circuiting in enhanced geothermal systems(EGSs),core flooding experiments were conducted on fractured granite cores under varying fracture widths,gel particle sizes and swelling ratios.Key parameters such as injection pressure,water breakthrough pressure,and residual resistance factor were measured to evaluate HT-PPG performance.The gel exhibited strong injectability,entering granite fractures at pressure gradients as low as 0.656 MPa/m;HT-PPG yields a superior sealing performance by significantly reducing the permeability;and dehydration occurs during HT-PPG propagation,with a dehydration ratio ranging from 4.71%to 11.36%.This study reveals that HT-PPG can be injected into geothermal formations with minimal pressure yet provides strong resistance to breakthrough once in place.This balance of injectability and sealing strength makes HT-PPG effective for addressing thermal short-circuiting in EGS reservoirs. 展开更多
关键词 geothermal reservoir granite reservoir enhanced geothermal systems high-temperature preformed particle gel fluid control sealing performance
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On the some issues of particle motion in the flow of viscoelastic fluids 认领 引用 被引量：2
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作者 Zhenna Li Jianzhong Lin 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2022年第3期1-9,I0001,共9页
Particle motion in confined shear flow of viscoelastic fluids is very common in nature and has a wide range of applications.Understanding and mastering the motion characteristics of particles in viscoelastic fluids ha... Particle motion in confined shear flow of viscoelastic fluids is very common in nature and has a wide range of applications.Understanding and mastering the motion characteristics of particles in viscoelastic fluids has important academic value and practical significance.In this paper,we first introduce the related equations and characteristic parameter,and then emphasize the following issues:the lateral equilibrium position of particle;interaction and aggregation of multiple particles;the chain structure formed by multiple particles;and the motion of non-spherical particle.Finally,some unresolved issues,challenges,and future research directions are highlighted. 展开更多
关键词 Particle Viscoelastic fluid Shear flow
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Influence of filler characteristics on particle removal in fluid catalytic cracking slurry under an alternating electric field 认领 引用 被引量：1
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作者 Qiang Li Hui-Zhen Yang +3 位作者 Can Yang Qing-Zhu Qiu Wei-Wei Xu Zhao-Zeng Liu 《Petroleum Science》 SCIE EI CAS CSCD 2024年第3期2102-2111,共10页
The characteristics of the packing material under an alternating electric field are an important factor in the removal of FCCS particles.In this study,the electric field distribution of a separation unit consisting of... The characteristics of the packing material under an alternating electric field are an important factor in the removal of FCCS particles.In this study,the electric field distribution of a separation unit consisting of packed spheres under an alternating electric field is simulated,and the movement mechanism of catalyst particles is analysed.An"effective contact point"model is derived to predict the adsorption of filler contact points on catalyst particles under the alternating electric field,and the model is validated by simulations and experiments.The numerical calculation and experimental results indicate that the electrical properties of the filler spheres,the filler angleθ,and the frequency f of the alternating electric field affect the adsorption of catalyst particles.As the frequency of the electric field increases,the particle removal efficiency of the high-conductivity filler(silicon carbide)increases and then settles,and the separation efficiency of the low-conductivity filler(glass,zirconia)is not sensitive to the change in electric field frequency. 展开更多
关键词 Fluid catalyticcracking slurry(FCCS) Particle AC electric field Fillers Removal
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Particle agglomeration behavior in fluidized bed during direct reduction of iron oxide by CO/H2mixtures 认领 引用 被引量：2
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作者 Feng Lu Hong Zhong +3 位作者 Bo Liu Jian Xu Sheng-fu Zhang Liang-ying Wen 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2023年第4期626-634,共9页
The agglomeration behavior of particles significantly impacts on the defluidization occurring in a fluidized bed during the direct reduction process.The influence of CO/H2ratio on surface diffusion of iron atoms wa... The agglomeration behavior of particles significantly impacts on the defluidization occurring in a fluidized bed during the direct reduction process.The influence of CO/H2ratio on surface diffusion of iron atoms was proposed,and the solid bridge force between iron oxide particles was quantificationally analyzed.Moreover,the solid bridge force was successfully added into a CFD–DEM(computational fluid dynamics–discrete element method)model combined with heat transfer and mass transport to investigate the detailed information of agglomeration in a fluidized bed,including the spatial distribution of temperature,velocity and metallization of iron oxide particles.The region of defluidization is sensitive to the reduction temperature.At the same reduction temperature,the iron oxide powder will perform higher metallization and stable fluidization properties with molar fraction of H2in the range of 0.6–0.8,when iron oxide is reduced by CO/H2mixture. 展开更多
关键词 Direct reduction Computational fluid dynamics Discrete element method Particle agglomeration CO/H2mixture Micro morphology
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An efficient non-iterative smoothed particle hydrodynamics fluid simulation method with variable smoothing length 认领 引用 被引量：1
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作者 Min Li Hongshu Li +2 位作者 Weiliang Meng Jian Zhu Gary Zhang 《Visual Computing for Industry,Biomedicine,and Art》 EI 2023年第1期1-13,共13页
In classical smoothed particle hydrodynamics(SPH)fluid simulation approaches,the smoothing length of Lagrangian particles is typically constant.One major disadvantage is the lack of adaptiveness,which may compromise a... In classical smoothed particle hydrodynamics(SPH)fluid simulation approaches,the smoothing length of Lagrangian particles is typically constant.One major disadvantage is the lack of adaptiveness,which may compromise accuracy in fluid regions such as splashes and surfaces.Attempts to address this problem used variable smoothing lengths.Yet the existing methods are computationally complex and non-efficient,because the smoothing length is typically calculated using iterative optimization.Here,we propose an efficient non-iterative SPH fluid simulation method with variable smoothing length(VSLSPH).VSLSPH correlates the smoothing length to the density change,and adaptively adjusts the smoothing length of particles with high accuracy and low computational cost,enabling large time steps.Our experimental results demonstrate the advantages of the VSLSPH approach in terms of its simulation accuracy and efficiency. 展开更多
关键词 Smoothed particle hydrodynamics Variable smooth length Fluid simulation
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The Heat-swimming Force on the Fiber-like Particle in Noncon-formity Temperature Fluid 认领 引用 被引量：1
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作者 朱泽飞 林建忠 叶秉良 《Journal of Donghua University(English Edition)》 EI CAS 2001年第1期64-67,共4页
Fiber-like particle suspensions are common in both nature and industry, yet research on them is still in its infancy. This paper focuses on the theoretical analysis of the heat-swimming force operating on the fiber-li... Fiber-like particle suspensions are common in both nature and industry, yet research on them is still in its infancy. This paper focuses on the theoretical analysis of the heat-swimming force operating on the fiber-like particle in nonconformity temperature fluid, and the approximate calculating formula has been proposed. It is indicated that the heat- swimming force on the fiber-like particle is in direct proportion to thetemperature gradient of fluid, but it has opposite direction and that it is restrained by the particle volume, the fluid viscosity and density rather than by the particle density. 展开更多
关键词 multi-phase fluid fiber- like particle heat-swimming force .
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BLOWUP CRITERION FOR THE COMPRESSIBLE FLUID-PARTICLE INTERACTION MODEL IN 3D WITH VACUUM 认领 引用 被引量：3
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作者 丁时进 黄炳远 卢友波 《Acta Mathematica Scientia》 SCIE CSCD 2016年第4期1030-1048,共19页
In this article, we consider the blowup criterion for the local strong solution to the compressible fluid-particle interaction model in dimension three with vacuum. We establish a BKM type criterion for possible break... In this article, we consider the blowup criterion for the local strong solution to the compressible fluid-particle interaction model in dimension three with vacuum. We establish a BKM type criterion for possible breakdown of such solutions at critical time in terms of both the L^∞ （0, T; L^6）-norm of the density of particles and the ^L1（0, T; L^∞）-norm of the deformation tensor of velocity gradient. 展开更多
关键词 Blowup criterion compressible fluid-particle interaction model vacuum
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Pressure Gradient Force,Saffman Lift,and Magnus Lift on the Fiber-like Particle in Fluid 认领 引用 被引量：9
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作者 朱泽飞 林建忠 《Journal of China Textile University(English Edition)》 2000年第2期23-27,共5页
Flher-like particle suspensions are common in both na-ture and industry, but there is little work reported on it.The forces acting on the fiber - like particle in fluid arestudied in this paper, and the Magnus lift, S... Flher-like particle suspensions are common in both na-ture and industry, but there is little work reported on it.The forces acting on the fiber - like particle in fluid arestudied in this paper, and the Magnus lift, Saffman lift,pressure gradient force, and then the dynamics modelhave been received. The numerical study of the simpleshear flow past the cylinders shows that the particles ’motion is controlled by the vortex. 展开更多
关键词 multi phase fluid fiber like particle force analysis
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THE EFFECT OF PARTICLES ON FLUID TURBULENCE IN A TURBULENT BOUNDARY LAYER OVER A CYLINDER 认领 引用
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作者 樊建人 施俊美 +1 位作者 郑友取 岑可法 《Acta Mechanica Sinica》 SCIE EI CAS 1997年第1期36-43,共8页
The turbulent fluid and particle interaction in the turbulent boundary layer for cross how over a cylinder has been experimentally studied. A phase-Doppler anemometer was used to measure the mean and fluctuating veloc... The turbulent fluid and particle interaction in the turbulent boundary layer for cross how over a cylinder has been experimentally studied. A phase-Doppler anemometer was used to measure the mean and fluctuating velocities of both phases. Two size ranges of particles (30 mu m similar to 60 mu m and 80 mu m similar to 150 mu m) at certain concentrations were used for considering the effects of particle sizes on the mean velocity profiles and on the turbulent intensity levels. The measurements clearly demonstrated that the larger particles damped fluid turbulence. For the smaller particles, this damping effect was less noticeable. The measurements further showed a delay in the separation point for two phase turbulent cross how over a cylinder. 展开更多
关键词 turbulent fluid and particle interaction two-phase turbulent cross flow over a cylinder boundary layer PDA measurement
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Removal of deposited metal particles on a horizontal surface by vertical submerged impinging jets 认领 引用 被引量：1
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作者 Han Peng Xinliang Jia +4 位作者 Xiaofang Guo Yubo Jiang Zhipeng Li Zhengming Gao J.J.Derksen 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2025年第7期137-147,共11页
Jet agitation is known as a maintenance-free stirring technique for nuclear wastewater treatment and demonstrates great potential in transport of radioactive particles.Removal processes of horizontal sediment beds dri... Jet agitation is known as a maintenance-free stirring technique for nuclear wastewater treatment and demonstrates great potential in transport of radioactive particles.Removal processes of horizontal sediment beds driven by impinging jets were experimentally investigated using image capture and processing technique.The beds were composed of heavy fine particles with particle density ranging from 3700 to 12600 kg·m-3 and particle diameter from 5 to 100 μm.The jet Reynolds number varied between 4300 and 9600.The single-phase large eddy simulation method was used for calculating both jet flow characteristics and wall shear stresses.The effects of jet strength,particle density,particle diameter,and bed thickness on bed mobility in terms of the critical Shields numbers were considered.Specifically,the critical Shields number was found to be intricately related to properties of particles,and independent of jet intensity.A new Shields number curve for stainless-steel particles was found,and a model was proposed to predict the transport rate of thin beds,with R2=0.96. 展开更多
关键词 Particle removal Impinging jet Shields number Computational fluid dynamics Two-phase flow Transport
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PREPARATION OF Fe_3O_4/PSt MAGNETIC PARTICLES IN THE PRESENCE OF MAGNETIC FLUID IN ETHANOL/WATER MIXTURE 认领 引用
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作者 Xiao-bin Ding Zong-hua Sun +1 位作者 Guo-xiang Wan Ying-yan Jiang 《Chinese Journal of Polymer Science》 SCIE CAS 1999年第2期129-134,共6页
Fe_3O_4/Polystyrene(PSt)magnetic particles with core/shell structure have been prepared in thepresence of Fe_3O_4 magnetic fluid in ethanol/water medium by dispersion polymeriation of styrene.A Fe_3O_4particle formati... Fe_3O_4/Polystyrene(PSt)magnetic particles with core/shell structure have been prepared in thepresence of Fe_3O_4 magnetic fluid in ethanol/water medium by dispersion polymeriation of styrene.A Fe_3O_4particle formation mechanism was proposed.According to this mechanism,the size of particle nuclei isdetermined by the extent of aggregation of Fe_3O_4/oligomer.Magnetic particles with diameter ranging from 5to 200μm were prepared under different reaction conditions.Some polymerization parameters such as theconcentration of monomer,stabilizer,initiator,and ethanol which affect particle size and size distribution arediscussed and their effect on particle formation are explained by the proposed mechanism. 展开更多
关键词 Fe_3O_4 magnetic fluid Magnetic particle Polystyrene Polymerization Mechanism
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Modeling of gas-solid flow in a CFB riser based on computational particle fluid dynamics 认领 引用 被引量：7
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作者 Zhang Yinghui Lan Xingying Gao Jinsen 《Petroleum Science》 SCIE CAS CSCD 2012年第4期535-543,共9页
A three-dimensional model for gas-solid flow in a circulating fluidized bed（CFB） riser was developed based on computational particle fluid dynamics（CPFD）.The model was used to simulate the gas-solid flow behavior ... A three-dimensional model for gas-solid flow in a circulating fluidized bed（CFB） riser was developed based on computational particle fluid dynamics（CPFD）.The model was used to simulate the gas-solid flow behavior inside a circulating fluidized bed riser operating at various superficial gas velocities and solids mass fluxes in two fluidization regimes,a dilute phase transport（DPT） regime and a fast fluidization（FF） regime.The simulation results were evaluated based on comparison with experimental data of solids velocity and holdup,obtained from non-invasive automated radioactive particle tracking and gamma-ray tomography techniques,respectively.The agreement of the predicted solids velocity and holdup with experimental data validated the CPFD model for the CFB riser.The model predicted the main features of the gas-solid flows in the two regimes;the uniform dilute phase in the DPT regime,and the coexistence of the dilute phase in the upper region and the dense phase in the lower region in the FF regime.The clustering and solids back mixing in the FF regime were stronger than those in the DPT regime. 展开更多
关键词 Gas-solid flow circulating fluidized bed computational particle fluid dynamics modeling hydrodynamics
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Influences of fluid physical properties,solid particles,and operating conditions on the hydrodynamics in slurry reactors 认领 引用 被引量：4
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作者 He Yang Aqiang Chen +4 位作者 Shujun Geng Jingcai Cheng Fei Gao Qingshan Huang Chao Yang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2022年第4期51-71,共21页
Slurry reactors are popular in many industrial processes,involved with numerous chemical and biological mixtures,solid particles with different concentrations and properties,and a wide range of operating conditions.Th... Slurry reactors are popular in many industrial processes,involved with numerous chemical and biological mixtures,solid particles with different concentrations and properties,and a wide range of operating conditions.These factors can significantly affect the hydrodynamic in the slurry reactors,having remarkable effects on the design,scale-up,and operation of the slurry reactors.This article reviews the influences of fluid physical properties,solid particles,and operating conditions on the hydrodynamics in slurry reactors.Firstly,the influence of fluid properties,including the density and viscosity of the individual liquid and gas phases and the interfacial tension,has been reviewed.Secondly,the solid particle properties(i.e.,concentration,density,size,wettability,and shape)on the hydrodynamics have been discussed in detail,and some vital but often ignored features,especially the influences of particle wettability and shape,as well as the variation of surface tension because of solid concentration alteration,are highlighted in this work.Thirdly,the variations of physical properties of fluids,hydrodynamics,and bubble behavior resulted from the temperature and pressure variations are also summarized,and the indirect influences of pressure on viscosity and surface tension are addressed systematically.Finally,conclusions and perspectives of these notable influences on the design and scale-up of industrial slurry reactors are presented. 展开更多
关键词 Multiphase reactors Fluid physical properties Particle Operating conditions Bubble column Airlift loop reactor
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A corrected particle method with high-order Taylor expansion for solving the viscoelastic fluid flow 认领 引用 被引量：2
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作者 T. Jiang J. L. Ren +1 位作者 W. G. Lu B. Xu 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2017年第1期20-39,共20页
In this paper, a corrected particle method based on the smoothed particle hydrodynamics (SPH) method with high-order Taylor expansion (CSPH-HT) for solving the viscoelastic flow is proposed and investigated. The valid... In this paper, a corrected particle method based on the smoothed particle hydrodynamics (SPH) method with high-order Taylor expansion (CSPH-HT) for solving the viscoelastic flow is proposed and investigated. The validity and merits of the CSPH-HT method are first tested by solving the nonlinear high order Kuramoto-Sivishinsky equation and simulating the drop stretching, respectively. Then the flow behaviors behind two stationary tangential cylinders of polymer melt, which have been received little attention, are investigated by the CSPH-HT method. Finally, the CSPH-HT method is extended to the simulation of the filling process of the viscoelastic fluid. The numerical results show that the CSPH-HT method possesses higher accuracy and stability than other corrected SPH methods and is more reliable than other corrected SPH methods. 展开更多
关键词 Smoothed particle hydrodynamics High-order Taylor expansion Viscoelastic fluid Extended pom-pom model
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Carotenoids Particle Formation by Supercritical Fluid Technologies 认领 引用 被引量：7
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作者 全灿 Johan Carlfors Charlotta Turner 《Chinese Journal of Chemical Engineering》 SCIE EI CAS 2009年第2期344-349,共6页
Based on the solubility in supercritical CO2,two strategies in which CO2 plays different roles are used to make quercetine and astaxanthin particles by supercritical fluid technologies.The experimental results showed ... Based on the solubility in supercritical CO2,two strategies in which CO2 plays different roles are used to make quercetine and astaxanthin particles by supercritical fluid technologies.The experimental results showed that micronized quercetine particles with mean particle size of 1.0-1.5 μm can be made via solution enhanced dispersion by supercritical fluids(SEDS) process,in which CO2 worked as turbulent anti-solvent;while for astaxanthin,micronized particles with mean particle size of 0.3-0.8 μm were also made successfully by rapid expansion supercritical solution(RESS) process. 展开更多
关键词 quercetine astaxanthin rapid expansion of supercritical solution solution enhanced dispersion by supercritical fluids particle formation
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