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The Richtmyer-Meshkov instability of a double-layer interface in convergent geometry with magnetohydrodynamics 认领 引用 被引量：2
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作者 Yuan Li Ravi Samtaney Vincent Wheatley 《Matter and Radiation at Extremes》 SCIE EI 2018年第4期207-218,共12页
The interaction between a converging cylindrical shock and double density interfaces in the presence of a saddle magnetic field is numerically investigated within the framework of ideal magnetohydrodynamics.Three flui... The interaction between a converging cylindrical shock and double density interfaces in the presence of a saddle magnetic field is numerically investigated within the framework of ideal magnetohydrodynamics.Three fluids of differing densities are initially separated by the two perturbed cylindrical interfaces.The initial incident converging shock is generated from a Riemann problem upstream of the first interface.The effect of the magnetic field on the instabilities is studied through varying the field strength.It shows that the Richtmyer-Meshkov and Rayleigh-Taylor instabilities are mitigated by the field,however,the extent of the suppression varies on the interface which leads to non-axisymmetric growth of the perturbations.The degree of asymmetry of the interfacial growth rate is increased when the seed field strength is increased. 展开更多
关键词 Magnetohydrodynamics Double density interfaces Converging shock Richtmyer-Meshkov instability
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Natural convection in a circular enclosure with an internal plate: Effect of inclination and eccentricity 认领 引用
2
作者 Wei Zhang 《International Journal of Fluid Engineering》 CSCD 2025年第4期128-138,共11页
A numerical study of natural convection in an enclosure containing an eccentrically positioned inclined flat plate is performed,and the impact of eccentricity and inclination angle on flow and heat transfer are analyz... A numerical study of natural convection in an enclosure containing an eccentrically positioned inclined flat plate is performed,and the impact of eccentricity and inclination angle on flow and heat transfer are analyzed using a finite-difference code.The effect of eccentricity on the convection mechanism in the large and small spaces separated by the plate is explored,as well as the way in which the deviation between the directions of the plate and the buoyancy force determines the fluid motion.It is found that the total heat transfer exhibits a dramatic increase as the normalized eccentricity reaches e/D=0.3,namely,by 21.2%,13.4%,and 20.5%at α=0°,90°,and 180°,respectively,compared with the e/D=0.2 case,owing to the enhanced heat transfer by conduction,which dominates the local flow and heat transfer in the small region between the plate and the enclosure.When the plate is inclined,primary,secondary,and tertiary vortices are generated in the two halves of the enclosure,and the intensity of the vortices increases as they approach the horizontal centerline.Analysis of the local heat transfer demonstrates that the maximum local heat transfer rate occurs either at the top of the enclosure owing to natural convection or at the position close to the end of the plate,where conduction dominates. 展开更多
关键词 internal plate eccentrically positioned inclined flat plate circular enclosure heat transfer natural convection eccentricity fluid motion convection mechanism
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