粗糙度对大高宽比槽道内流动影响的数值模拟

计算物理 ›› 2013, Vol. 30 ›› Issue (5): 759-765.

粗糙度对大高宽比槽道内流动影响的数值模拟

刘东¹, 蒋斌¹, 刘明侯²

1. 西南科技大学土木工程与建筑学院, 绵阳 621010;
2. 中国科学技术大学热科学和能源工程学院, 合肥 230027

收稿日期:2012-10-08 修回日期:2013-03-16 出版日期:2013-09-25 发布日期:2013-09-25
作者简介:刘东(1984-),男,博士,讲师,主要从事微尺度流动和传热研究,E-mail:dtldl23@mail.ustc.edu.cn
基金资助:
国家自然科学基金(51306156);四川省教育厅资助科研项目(11ZA132&11ZB110);西南科技大学博士基金(11zx7159)资助项目

Numerical Simulation of Surface Roughness Effect in Large Height-Width Ratio Mini-channel Flows

LIU Dong¹, JIANG Bin¹, LIU Minghou²

1. School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, China;
2. Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China

Received:2012-10-08 Revised:2013-03-16 Online:2013-09-25 Published:2013-09-25

摘要/Abstract

摘要： 基于确定表面粗糙结构形状的PML模型模拟表面粗糙度对大高宽比小槽道内流动特性的影响,并与3-D模拟结果对比,结果较为一致.基于该模型对不同的流速和不同的粗糙度进行模拟,结果表明:表面粗糙度导致槽道内出现速度线性分布的流动底层.Re数相同时,单位长度压降与相对粗糙度成二次方关系.粗糙单元高度相同时,压降随Re线性增加.

关键词: 小槽道, 粗糙度, PML模型

Abstract: A PML model based on fixed surface roughness is used in simulation of surface roughness effect on flow in mini-channels. Compared with 3-D simulation, results of pressure drop agree well. With PML model and 3-D model we simulate different flow rates and roughness, it shows that surface roughness results in speed linear flow substrate. Pressure drop and relative roughness follow a secondary power relation as Re number is fixed. Pressure drop increased linearly with Re number as roughness elements is equal.

Key words: mini-channel, roughness, PML model

中图分类号:

TK124

刘东, 蒋斌, 刘明侯. 粗糙度对大高宽比槽道内流动影响的数值模拟[J]. 计算物理, 2013, 30(5): 759-765.

LIU Dong, JIANG Bin, LIU Minghou. Numerical Simulation of Surface Roughness Effect in Large Height-Width Ratio Mini-channel Flows[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2013, 30(5): 759-765.

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