Effect of viscous dissipation on forced-convection heat transfer in cylindrical packed-beds

2002 ◽  
Vol 45 (2) ◽  
pp. 461-464 ◽  
Author(s):  
San San Yee ◽  
Kouichi Kamiuto
Keyword(s):  
Heat Transfer ◽  
Forced Convection ◽  
Viscous Dissipation ◽  
Convection Heat Transfer ◽  
Packed Beds ◽  
Convection Heat ◽  
Forced Convection Heat Transfer

Effect of Entry Temperature on Forced Convection Heat Transfer With Viscous Dissipation in Thermally Developing Region of Concentric Annuli

2015 ◽  
Vol 137 (12) ◽  
Author(s):  
M. M. J. Kumar ◽  
V. V. Satyamurty
Keyword(s):  
Heat Transfer ◽  
Forced Convection ◽  
Viscous Dissipation ◽  
Numerical Solutions ◽  
Convection Heat Transfer ◽  
Radial Coordinate ◽  
Convection Heat ◽  
Forced Convection Heat Transfer ◽  
Nusselt Numbers ◽  
Circular Pipes

Steady laminar forced convection heat transfer in the thermal entrance region of concentric annuli has been studied considering viscous dissipation characterized by the Brinkman number. The inner and outer pipes have been kept at constant and equal temperature. Two cases of entry temperatures have been considered, case 1: an entry temperature that varies with the radial coordinate, obtained by an adiabatically prepared fluid, i.e., attained by the fluid due to viscous dissipation in an adiabatic concentric annular duct and case 2: the conventional uniform entry temperature. The numerical results presented include the nondimensional temperature profiles, Nusselt numbers, and heat transferred from (or to) the inner and outer pipes. It has been shown from the numerical solutions that it is necessary to employ the dissipative entry temperature in place of conventional uniform entry temperature for higher Brinkman numbers. The results for circular pipes follow when the radius ratio takes the limiting value of zero.

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