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首页> 外文期刊>Journal of porous media >LATTICE BOLTZMANN MODELING ON FORCED CONVECTIVE HEAT TRANSFER OF NANOFLUIDS IN HIGHLY CONDUCTIVE FOAM METALS WITH LOCAL THERMAL NONEQUILIBRIUM (LTNE) EFFECT
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LATTICE BOLTZMANN MODELING ON FORCED CONVECTIVE HEAT TRANSFER OF NANOFLUIDS IN HIGHLY CONDUCTIVE FOAM METALS WITH LOCAL THERMAL NONEQUILIBRIUM (LTNE) EFFECT

机译：用局部热非平衡（LTNE）效应高导电泡沫金属纳米流体强制对流热传递的格子Boltzmann建模

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摘要

Highly conductive porous foams and nanofluids are efficient materials for enhancing heat transfer. This paper presents a numerical investigation of convective heat transfer of a nanofluid in porous foams using a lattice Boltzmann (LB) method. We model the nonequilibrium thermal transport of nanofluid and solid phases by considering the thermal conductivity difference of the nanofluid and the metal foam. Flow and heat transfer characteristics of nanofluids in metal foams are analyzed based on velocity and temperature fields. Effects of key parameters on flow and thermal performances are discussed. An entropy generation analysis is conducted for nanofluid convection in porous media. Results show that Nusselt number increases with a decrease in porosity and an increase in Reynolds number (Re), Darcy number (Da), thermal conductivities of nanoparticles and solid ligaments, and nanoparticle volume fraction. The performance evaluation criterion (PEC) is sensitive to Re in the range Re <= 600. This work provides a numerical procedure for the treatment of flow/thermal transport of nanofluids in porous media under the local thermal nonequilibrium (LTNE) condition.
机译：高导电的多孔泡沫和纳米流体是用于增强热传递的有效材料。本文介绍了使用晶格Boltzmann（LB）法的多孔泡沫中纳米流体对流热传递的数值研究。通过考虑纳米流体和金属泡沫的导热差异，我们模拟纳米流体和固相的非喹啉热传输。基于速度和温度场，分析了金属泡沫中纳米流体的流动和传热特性。讨论了关键参数对流动和热性能的影响。对多孔介质中的纳米流体对流进行熵产生分析。结果表明，纽带数随孔隙率的减少和雷诺数（RE），纳米颗粒（RE），纳米颗粒的导热率和固体韧带的增加，以及纳米颗粒体积分数。性能评估标准（PEC）在RE <= 600的范围内对RE敏感。该工作提供了在局部热非管状（LTNE）条件下的多孔介质中纳米流体的流动/热传输的数值方法。

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