Entropy generation in thermally developing laminar forced convection through a slit microchannel

Sadeghi, A ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1115/FEDSM-ICNMM2010-31070
  3. Publisher: 2010
  4. Abstract:
  5. The issue of entropy generation in laminar forced convection of a Newtonian fluid through a slit microchannel is analytically investigated by taking the viscous dissipation effect, the slip velocity and the temperature jump at the wall into account. Flow is considered to be hydrodynamically fully developed but thermally developing. The energy equation is solved by means of integral transform. The results demonstrate that to increase Knudsen number is to decrease entropy generation, while the effect of increasing values of Brinkman number and the group parameter is to increase entropy generation. Also it is disclosed that in the thermal entrance region the average entropy generation number over the cross section of channel is an increasing function of axial coordinate. Copyright
  6. Keywords:
  7. Knudsen number ; Microchannel ; Bejan number ; Entropy generation ; Knudsen numbers ; Slip flow ; Viscous dissipation ; Fluids ; Forced convection ; Integral equations ; Microchannels ; Viscous flow ; Entropy
  8. Source: ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels Collocated with 3rd Joint US-European Fluids Engineering Summer Meeting, ICNMM2010, 1 August 2010 through 5 August 2010, Montreal, QC ; Issue PARTS A AND B , 2010 , Pages 515-526 ; 9780791854501 (ISBN)
  9. URL: http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1621474