M. Ouldrouis et al., NUMERICAL AND EXPERIMENTAL-STUDY OF MASS AND MOMENTUM-TRANSFER IN DEVELOPING LAMINAR-FLOW IN ANNULUS, International journal of heat and mass transfer, 38(6), 1995, pp. 953-967
The hydrodynamic characteristics and the mass transfer were determined
in the entrance region of an annulus with simultaneous development of
velocity and concentration fields. A finite difference method was car
ried out to solve the problem by using the boundary layer assumptions.
Two kinds of boundary conditions at the entrance were considered: uni
form axial velocity and axial velocity at the exit of a porous media,
which corresponds to experimental conditions. The velocity profiles at
different axial locations were determined by laser Doppler velocimetr
y for different values of the Reynolds number. The wall shear stresses
and the local mass transfer coefficients were obtained on microelectr
odes by performing a polarographic method. The numerical predictions a
re in a good agreement with the experimental data.