局部热非均衡和重力波动对达西-布林克曼多孔对流开始的影响

G. Y. H., Manjunatha N, N. H, R. Udhayakumar
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引用次数: 0

摘要

对局部热不平衡(LTNE)模型中带有重力波动的达西-布林克曼(Darcy-Brinkman)对流问题进行了数值研究。利用线性稳定性分析探讨了对流问题,并通过单程 Galerkin 方法计算了起始对流的瑞利数和波数数值。考虑了三种不同类型的重力波动(线性、抛物线和指数)。结果表明,达西数和重力参数会延迟对流的发生。孔隙率-烫伤传导比和界面传热系数对构型的稳定性有显著影响。图表描述了各种参数的影响,突出了在确定对流稳定性阈值时纳入重力波动和非平衡条件的重大影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Impact of Local Thermal Non-Equilibrium and Gravity Fluctuations on the Onset of a Darcy-Brinkman Porous Convection
The numerical investigation of the Darcy-Brinkman convective problem with gravity fluctuations in a Local Thermal Nonequilibrium (LTNE) model is conducted. Utilizing linear stability analysis, the convective problem is explored, and the numerical values of the Rayleigh and wave numbers for onset convection are computed through the one-term Galerkin approach. Three distinct types of gravity fluctuations (linear, parabolic, and exponential) are considered. The results show the Darcy number and gravity parameter delay the onset of convection. The porosity-scald conductivity ratio and interface heat transfer coefficient have a significant effect on the stability of the configuration. Graphical representations depict the effects of various parameters, highlighting the significant impacts of incorporating gravity fluctuations and non-equilibrium conditions in determining convection stability thresholds.
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