Artificial compressibility based CBS solutions for double diffusive natural convection in cavities
Artificial compressibility based CBS solutions for double diffusive natural convection in cavities
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DOI：
10.1108/09615531311289196
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发表时间：
2013-04
影响因子：
4.2
通讯作者：
F. Arpino;N. Massarotti;A. Mauro;P. Nithiarasu
中科院分区：
文献类型：
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作者：
F. Arpino;N. Massarotti;A. Mauro;P. Nithiarasu
目的-本文的目的是数值模拟具有不同纵横比的矩形空腔中的稳态热溶质对流，受到水平温度和浓度梯度的影响，设计/方法/途径-基于特征的分裂（CBS）的完全显式人工压缩（AC）版本采用差分格式求解双扩散问题。进行了稳定性分析，以有效地解决在目前的工作中考虑的问题。作用在流体上的热和溶质浮力已被考虑的情况下，援助和反对的流动conditions.Findings -的稳定性极限由作者推导的热溶质对流假设一个基本的作用，有效地解决DD问题考虑。在Rayleigh数较大的情况下，只有采用新的方法才能得到收敛解。
Purpose – The purpose of the paper is to numerically simulate steady‐state thermo‐solutal convection in rectangular cavities with different aspect ratios, subject to horizontal temperature and concentration gradients, and validate the results against numerical and experimental data available from literature.Design/methodology/approach – The fully explicit Artificial Compressibility (AC) version of the Characteristic Based Split (CBS) scheme is adopted to solve double diffusion (DD) problems. A stabilization analysis is carried out to efficiently solve the problems considered in the present work. The thermal and solutal buoyancy forces acting on the fluid have been taken into account in case of aiding and opposing flow conditions.Findings – The stability limits derived by the authors for the thermo‐solutal convection assume a fundamental role to efficiently solve the DD problems considered. In the cases characterized by higher Rayleigh number the convergent solution is obtained only by employing the new st...