Entropy generation in parallel plate microchannels

Erbay L. B., Yalcin M. M., Ercan M. S.

HEAT AND MASS TRANSFER, vol.43, no.8, pp.729-739, 2007 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 43 Issue: 8
  • Publication Date: 2007
  • Doi Number: 10.1007/s00231-006-0164-0
  • Journal Name: HEAT AND MASS TRANSFER
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.729-739
  • Eskisehir Osmangazi University Affiliated: Yes

Abstract

In this study the entropy generation in microchannels in microdevices induced by the transient laminar forced convection in the combined entrance region between two parallel plates has been investigated numerically. The study considers the microscales in the region of Kn < 0.001. The effects of aspect ratio, Reynolds number, Prandtl number, Brinkman number, and the motion of the lower plate on the entropy generation during the simultaneously developing flow in a parallel-plates channel are investigated. The obtained results addressing all cases are thoroughly in good agreement with the expectations that the entropy generation has its highest value at channel with the smallest aspect ratio at counter motion of the lower plate with the highest Re, Pr and Br/Omega values considered in the problem.