Title of article
Slip-Flow and Heat Transfer in Isoflux Rectangular Microchannels with Thermal Creep Effects
Author/Authors
Niazmand، H. نويسنده , , Amiri Jaghargh، A. نويسنده , , Renksizbulut، M. نويسنده ,
Issue Information
ماهنامه با شماره پیاپی 6 سال 2010
Pages
9
From page
33
To page
41
Abstract
A control-volume numerical approach has been used to study rarefaction effects in simultaneously hydrodynamically
and thermally developing flow in rectangular microchannels with a prescribed uniform wall heat flux in the slip-flow
regime (10 -3 ? Kn ? 10 -1 ). The effects of velocity slip and thermal creep on the key flow parameters are examined in
detail. Low Reynolds number flows (Re ? 1) for different channel aspect ratios (0 ? ?* ? 1) are considered. The
effects of rarefaction on the global features of the flow and thermal development in the entrance region are examined.
Dramatic reductions in the friction coefficient are observed in the entrance region due to rarefaction effects, which
are enhanced by thermal creep. For the fluid heating cases considered here, thermal creep increases slip at the wall
and thereby further reduces the friction coefficient and slightly enhances heat transfer at a given Reynolds number.
For an identical heat flux applied to the microchannel walls, thermal creep effects become much more pronounced at
lower Reynolds numbers since it results in higher axial temperature gradients.
Journal title
Journal of Applied Fluid Mechanics (JAFM)
Serial Year
2010
Journal title
Journal of Applied Fluid Mechanics (JAFM)
Record number
2398456
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