热源位于壁面的微通道内流体流动和传热的晶格玻尔兹曼模拟

IF 3.3 3区 物理与天体物理 Q2 PHYSICS, CONDENSED MATTER
Kourosh Javaherdeh , Habib Karimi , Touraj Azarbarzin
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引用次数: 2

摘要

本文对上下壁面分别设置4个热源的微通道内流体流动和换热进行了数值研究。四个热源相对于中心线对称分布于上下壁面。采用点阵玻尔兹曼方法求解流体的流动和温度的相关方程,该方法包括碰撞和流动两个步骤。空气的雷诺数从0.1变化到10,克努森数从0变化到0.1。采用滑移速度和温度跳变边界条件对微通道进行了数值模拟,并引入了与滑移速度流动相关的Knudsen数。所有实体边界均采用反弹边界条件,即碰撞后的边界种群与边界种群相等。并与其他研究进行了比较,取得了较好的效果。结果表明:Knudsen数对换热有重要影响,出口平均温度在Knudsen数最高时最高,第一热源的换热对流比第二热源的换热对流更显著。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Lattice Boltzmann simulation of fluid flow and heat transfer in a micro channel with heat sources located on the walls

This study investigated a numerical study of fluid flow and heat transfer in micro channel with four heat sources that located on upper and lower walls. Four heat sources are located in the upper and lower walls symmetrically respect to centerline. Lattice Boltzmann method is used to solve related equations of flow and temperature of fluids, this method is included two steps such as collision and streaming steps. Reynolds number is varied from 0.1 to 10 and Knudsen number is changed from 0 to 0.1 for air. The slip velocity and temperature jump boundary condition are used for micro channel simulation with Knudsen numbers related to slip velocity flow. Bounce-back boundary conditions were applied on all solid boundaries, which means that incoming boundary populations are equal to out-going populations after the collision. A comparison with other study is done and a good result is gained. The results show that the Knudsen number has important role in heat transfer and the highest mean temperature at outlet occurs at highest Knudsen number and heat transfer convection is more significant for first heat source comparing second heat source.

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来源期刊
Superlattices and Microstructures
Superlattices and Microstructures 物理-物理:凝聚态物理
CiteScore
6.10
自引率
3.20%
发文量
35
审稿时长
2.8 months
期刊介绍: Superlattices and Microstructures has continued as Micro and Nanostructures. Micro and Nanostructures is a journal disseminating the science and technology of micro-structures and nano-structures in materials and their devices, including individual and collective use of semiconductors, metals and insulators for the exploitation of their unique properties. The journal hosts papers dealing with fundamental and applied experimental research as well as theoretical studies. Fields of interest, including emerging ones, cover: • Novel micro and nanostructures • Nanomaterials (nanowires, nanodots, 2D materials ) and devices • Synthetic heterostructures • Plasmonics • Micro and nano-defects in materials (semiconductor, metal and insulators) • Surfaces and interfaces of thin films In addition to Research Papers, the journal aims at publishing Topical Reviews providing insights into rapidly evolving or more mature fields. Written by leading researchers in their respective fields, those articles are commissioned by the Editorial Board. Formerly known as Superlattices and Microstructures, with a 2021 IF of 3.22 and 2021 CiteScore of 5.4
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