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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

Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2009-06-15

Journal: 工程热物理学报

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

Volume: 30

Issue: 6

Page Number: 1045-1047

ISSN: 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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