化工进展2023，Vol.42Issue(11)：5622-5636,15.DOI:10.16085/j.issn.1000-6613.2022-2321
锯齿型微通道流动与传热特性数值模拟
Numerical simulation of fluid flow and heat transfer characteristics in a saw-like microchannel
摘要
Abstract
In this study,a saw-like microchannel was proposed to enhance convective heat transfer.The fluid flow and heat transfer characteristics of this proposed microchannel were numerically investigated using COMSOL software.The effect of saw-like microchannel on fluid flow and heat transfer performance were studied in both forward and backward direction.The Reynolds number(Re)ranged from 50 to 700.The numerical results indicated that the present microchannel configuration greatly strengthened the spatial mixing of fluid and significantly disturbs the thermal boundary layer,leading to dramatic enhancement of convective heat transfer.Compared to conventional microchannel,Nusselt number(Nu)was significantly enhanced by 102.7% .Additionally,fluid flow and heat transfer characteristics of this saw-like microchannel in both forward and backward directions were investigated.At Re=700,the Nu in the backward direction was increased by 20% compared to that in forward direction.However,the pressure drop was magnified about 110% .关键词
锯齿型微通道/共轭传热强化/流体混合/努塞尔数Key words
saw-like microchannel/enhancement of conjugate heat transfer/fluid mixing/Nusselt number分类
机械工程引用本文复制引用
刘兆轩,张程宾,韩群,姜海涛,李文明..锯齿型微通道流动与传热特性数值模拟[J].化工进展,2023,42(11):5622-5636,15.基金项目
航空科学基金(2020Z028069003) （2020Z028069003）
装备预研教育部联合基金(8091B022125). （8091B022125）
