A Theoretical Study, With Experimental Verification, of the Temperature-Dependent Viscosity Effect on the Forced Convection Through a Porous Medium Channel

1999 ◽  
Vol 121 (2) ◽  
pp. 500-503 ◽  
Author(s):  
D. A. Nield ◽  
D. C. Porneala ◽  
J. L. Lage
Keyword(s):  
Porous Medium ◽  
Forced Convection ◽  
Experimental Verification ◽  
Theoretical Study ◽  
Temperature Dependent ◽  
Temperature Dependent Viscosity ◽  
Viscosity Effect ◽  
Dependent Viscosity

scholarly journals Heatline Visualization of Natural Convection in a Porous Cavity Occupied by a Fluid With Temperature-Dependent Viscosity

2008 ◽  
Vol 130 (1) ◽  
Author(s):  
K. Hooman ◽  
H. Gurgenci
Keyword(s):  
Porous Medium ◽  
Nusselt Number ◽  
Temperature Dependent ◽  
Exponential Form ◽  
Comprehensive Investigation ◽  
Temperature Dependent Viscosity ◽  
Temperature Relation ◽  
Mean Values ◽  
Viscosity Effect ◽  
Dependent Viscosity

Temperature-dependent viscosity effect in buoyancy driven flow of a gas or a liquid in an enclosure filled with a porous medium is studied numerically based on the general model of momentum transfer in a porous medium. The exponential form of viscosity-temperature relation is applied to examine three cases of viscosity-temperature relation: constant, decreasing, and increasing. Application of arithmetic and harmonic mean values of the viscosity is also investigated for their ability to represent the Nusselt number versus the effective Rayleigh number. Heat lines are illustrated for a more comprehensive investigation of the problem.

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