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首页> 外文期刊>International Journal of Heat and Mass Transfer >Fluid-structure interaction analysis of mixed convection heat transfer in a lid-driven cavity with a flexible bottom wall
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Fluid-structure interaction analysis of mixed convection heat transfer in a lid-driven cavity with a flexible bottom wall

机译：具有柔性底壁的盖驱动腔内混合对流换热的流固耦合分析

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摘要

A numerical investigation of steady laminar mixed convection heat transfer in a lid driven cavity with a flexible bottom surface is analyzed. A stable thermal stratification configuration was considered by imposing a vertical temperature gradient while the vertical walls were considered to be insulated. In addition, the transport equations were solved using a finite element formulation based on the Calerkin method of weighted residuals. In essence, a fully coupled fluid-structure interaction (FSI) analysis was utilized in this investigation. Moreover, the fluid domain is described by an Arbitrary-Lagrangian-Eulerian (ALE) formulation that is fully coupled to the structure domain. Comparisons of streamlines, isotherms, bottom wall displacement and average Nusselt number were made between rigid and flexible bottom walls. The results of this investigation revealed that the elasticity of the bottom wall surface plays a significant role on the heat transfer enhancement. Furthermore, the contribution of the forced convection heat transfer to that offered by natural convection heat transfer has a profound effect on the behavior of the flexible wall as well as the momentum and energy transport processes within the cavity. This investigation paves the road for future research studies to consider flexible walls when augmentation of heat transfer is sought.
机译：分析了具有柔性底面的盖子驱动腔内稳态层流混合对流换热的数值研究。通过施加垂直温度梯度来考虑稳定的热分层配置，同时垂直壁被认为是隔热的。另外，使用基于加权残差的Calerkin方法的有限元公式来求解运输方程。本质上，在这项研究中使用了完全耦合的流固耦合（FSI）分析。此外，流体域由与结构域完全耦合的任意拉格朗日-欧拉（ALE）公式描述。对刚性和柔性底壁之间的流线，等温线，底壁位移和平均努塞尔数进行了比较。该调查的结果表明，底壁表面的弹性在热传递增强中起重要作用。此外，强制对流换热对自然对流换热的贡献对柔性壁的性能以及腔体内的动量和能量传输过程都有深远的影响。这项研究为将来的研究铺平了道路，当寻求增加传热时考虑柔性墙。

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