||EFFECT OF PERMEABILITY ANISOTROPY ON FORCED CONVECTION THERMAL - HYDRODYNAMICS OF ENTRANCE AND DEVELOPED FLOW REGIMES IN POROUS SATURATED CIRCULAR TUBE
AKOWANOU CHRISTIAN D. ,
DEGAN GÉRARD ,
PRODJINONTO VINCENT ,
||Journal of Applied Science and Technology (JAST)
||Forced convective flow through anisotropic porous saturated circular tube was analysed to determine the entrance
length to the hydrodynamic flow. The porous medium saturated with an incompressible viscous fluid was
characterized by anisotropy permeability ratio, inclination angle of the principal axes and Prandtl number. The
flow field was a succession of two distinct flow regions, the entrance region followed by fully developed flow
regime. The boundary-layer regime prevailing at the thermal entrance region was analysed by integral relations
approach, and analytical expressions of the entrance length, wall friction and heat transfer rate were obtained.
Limiting cases for flow applicable to low and high porosity media were also observed. The anisotropic properties
of the porous medium were significant where permeability ratio was either greater or less than 1.
||Forced convection, Porous medium, Hydrodynamic flow field, Anisotropy Permeability ratio, Wall friction
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