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低雷诺数下矩形竖腔内混合对流的格子Boltzmann方法模拟

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Indexed by:期刊论文

Date of Publication:2009-06-15

Journal:工程热物理学报

Included Journals:Scopus、EI、PKU、ISTIC、CSCD

Volume:30

Issue:6

Page Number:1045-1047

ISSN No.:0253-231X

Key Words:格子Boltzmann方法 混合对流 纵横比 矩形腔

Abstract:文中采用格子Boltzmann力矩模型模拟了不同纵横比(A)、瑞利数(Ra)、雷诺数(Re)下两维矩形腔内的混合流动,得到不同条件下矩形腔内的流线和等温线图,并描述了其特点.模拟结果表明,在低雷诺数下,当强制对流占主导时,换热可看作矩形腔内上部强制对流换热Nucv加权该部分尺寸与下部导热Nucd加权下部导热尺寸的综合作用结果.得到整体换热强度随纵横比变化的经验公式,并给出其适用范围.

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