Numerical study of buoyancy- and thermocapillary-driven flows in a cavity
Numerical study of buoyancy- and thermocapillary-driven flows in a cavity
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空腔中浮力和热毛细管驱动流动的数值研究
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
Zhuang Lixian
中科院分区：
文献类型：
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作者：
Lu Xiyun;Zhuang Lixian
利用二维Navier-Stokes方程和能量方程的数值解，研究了端壁受热差的开腔中热毛细和浮力驱动的对流。本文研究了低普朗特数流体填充的空腔内的热毛细对流和浮力对流，其中双径比sa =1和4，Grashof数可达105，雷诺数<e:2> Re <e:2>≤104。我们的研究结果表明，热毛细对主要由浮力驱动的流动的稳定性，以及对加性效应（即正vere）和反性效应（即负vere）的流动结构和动力学行为都有相当显著的影响。
Thermocapillary- and buoyancy-driven convection in open cavities with differentially heated endwalls is investigated by numerical solutions of the two-dimensional Navier-Stokes equations coupled with the energy equation. We studied the thermocapillary and buoyancy convection in the cavities, filled with low-Prandtl-number fluids, with two aspect-ratiosA=1 and 4, Grashof number up to 105 and Reynolds number ⋎Re⋎≤104. Our results show that thermocapillary can have a quite significant effect on the stability of a primarily buoyancy-driven flow, as well as on the flow structures and dynamic behavior for both additive effect (i.e., positiveRe) and opposing effect (i.e., negativeRe).