Convective heat transfer in a parallel plate channel with porous lining

1983 ◽  
Vol 17 (4) ◽  
pp. 211-216 ◽  
Author(s):  
M. N. Channabasappa ◽  
K. G. Umapathy ◽  
I. V. Nayak
Keyword(s):  
Heat Transfer ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Parallel Plate ◽  
Plate Channel ◽  
Porous Lining

Pressure Work and Viscous Dissipation Effects on Heat Transfer in a Parallel–Plate Microchannel Gas Flow

2017 ◽  
Vol 35 (02) ◽  
pp. 243-254 ◽  
Author(s):  
K. M. Ramadan
Keyword(s):  
Heat Transfer ◽  
Convective Heat Transfer ◽  
Viscous Dissipation ◽  
Convective Heat ◽  
Parallel Plate ◽  
Gas Flow ◽  
Combined Effect ◽  
Rarefaction Analysis ◽  
Pressure Work ◽  
Axial Conduction

ABSTRACTConvective heat transfer in a parallel plate microchannel gas flow is investigated analytically and numerically, considering the effects of viscous dissipation, pressure work, shear work, axial conduction and rarefaction. Analysis is performed with constant wall temperature and constant wall heat flux boundary conditions for both gas cooling and heating. The results presented demonstrate the significance of the combined effect of pressure work and viscous dissipation, shear work, rarefaction degree and axial conduction on microchannel convective heat transfer, in both the thermally developing and fully developed flow regions. Viscous dissipation and pressure work in a pressure-driven microchannel gas flow are of comparable magnitudes and may not be neglected from the energy equation. The shear work at the wall, which is effectively the combined effect of viscous dissipation and pressure work, needs to be included in the Nusselt number for better predictions of heat transfer.

Mixed Convection in a Vertical Parallel Plate Microchannel

2006 ◽  
Vol 129 (2) ◽  
pp. 162-166 ◽  
Author(s):  
Mete Avcı ◽  
Orhan Aydın
Keyword(s):  
Heat Transfer ◽  
Mixed Convection ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Newtonian Fluid ◽  
Wall Temperature ◽  
Parallel Plate ◽  
Temperature Jump ◽  
Velocity Slip ◽  
Convection Parameter

In this study, fully developed mixed convective heat transfer of a Newtonian fluid in an open-ended vertical parallel plate microchannel is analytically investigated by taking the velocity slip and the temperature jump at the wall into account. The effects of the mixed convection parameter, Gr/Re, the Knudsen number, Kn, and the ratio of wall temperature difference, rT, on the microchannel hydrodynamic and thermal behaviors are determined. Finally, a Nu=f(Gr∕Re,Kn,rT) expression is developed.

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