Numerical Simulation of Roughness Effect on Gaseous Flow and Heat Transfer in Microchannels

Author

Zhang, Tian-tian ; Jia, Li

Author_Institution

Dept. of Power Eng., Beijing Jiaotong Univ.

fYear

2007

fDate

16-19 Jan. 2007

Firstpage

136

Lastpage

141

Abstract

A three-dimensional compressible model of microchannel was established. Flow and heat transfer characteristics of nitrogen flows in microchannels (hydraulic diameter is 100 mum) with designed roughness in form of obstructions placed along channels walls have been investigated numerically through a finite element CFD code consideration of the effect of compressibility and viscosity heating. The model was verified through comparing with experiment data. Then the effects of the Reynolds number, obstruction height, obstruction pitch, obstruction geometry and width to height Ratio of obstruction on the flow and heat transfer characteristics were investigated.

Keywords

compressibility; compressible flow; finite element analysis; flow simulation; heat transfer; microchannel flow; surface roughness; viscosity; 100 micron; 3D compressible model; Reynolds number; compressibility effect; finite element CFD code; gaseous flow; heat transfer; microchannel flow; nitrogen flows; numerical simulation; obstruction geometry; obstruction height; obstruction pitch; roughness effect; viscosity heating; Friction; Geometry; Heat transfer; Hydraulic diameter; Microchannel; Nitrogen; Numerical simulation; Rough surfaces; Surface roughness; Viscosity; gaseous flow; heat transfer; microchannel; numerical simulation; obstruction; roughness effect;

fLanguage

English

Publisher

ieee

Conference_Titel

Nano/Micro Engineered and Molecular Systems, 2007. NEMS '07. 2nd IEEE International Conference on

Conference_Location

Bangkok

Print_ISBN

1-4244-0610-2

Type

conf

DOI

10.1109/NEMS.2007.352247

Filename

4160550