Technical Briefs

Effect of Surface Microstructure on Microchannel Heat Transfer Performance

[+] Author and Article Information
Yang Liu1

 Dalian University of Technology, Dalian 116024, Liaoning Province, Chinayang_liu@mail.dlut.edu.cn

Jing Cui, WeiZhong Li, Ning Zhang

 Dalian University of Technology, Dalian 116024, Liaoning Province, Chinayang_liu@mail.dlut.edu.cn


Corresponding author.

J. Heat Transfer 133(12), 124501 (Oct 12, 2011) (6 pages) doi:10.1115/1.4004594 History: Received July 27, 2010; Revised July 10, 2011; Published October 12, 2011; Online October 12, 2011

In this paper, forced convection heat transfer occurring in microchannels with different microstructures is investigated numerically. It is found that vortices will appear in the microstructure grooves. The influence of microchannel geometries on heat transfer performance is evaluated by Nusselt number and the entrance effect is noted for all geometries. Compared with the plain plate surface, a much more moderate decrease of local Nusselt number can be found for all the grooved microstructures, indicating more uniform heat transfer intensity along the flowing direction. The results also suggest that the heat transfer performance improves with inlet Reynolds number. The V-shaped grooved microstructure possesses the highest heat transfer performance. Compared with the plain plate surface, averaged Nusselt number can be increased by about 1.6 times. Through the field synergy principle analysis, we find that it is the synergy between temperature gradient and velocity that results in different heat transfer performance for different microstructures.

Copyright © 2011 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Figure 1

Schematic of the flow passage

Grahic Jump Location
Figure 2

Microstructure geometries and dimensions (Structure A: Ridge-shaped groove; Structure B: V-shaped groove; Structure C: shield-shaped groove; Structure D: straight slot groove; and Structure E: plain surface)

Grahic Jump Location
Figure 3

Lattice geometries and velocity vectors of (a) D2Q9 model and (b) D2Q5 model

Grahic Jump Location
Figure 4

Local Nu distribution along the flowing direction: (a) Structure A; (b) Structure B; (c) Structure C; (d) Structure D; and (e) Structure E

Grahic Jump Location
Figure 5

Flowing direction averaged Nu

Grahic Jump Location
Figure 6

Outlet temperature, K

Grahic Jump Location
Figure 7

Streamlines for different microstructures under Re=  800 case

Grahic Jump Location
Figure 8

Friction factor results

Grahic Jump Location
Figure 9

Synergy angle β varying with Reynolds number




Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In