Diffusion-Thermo Effects on Free Convective Heat and Mass Transfer Flow in a Vertical Channel With Symmetric Boundary Conditions

Author:

Jha Basant K.1,Ajibade Abiodun O.1

Affiliation:

1. Department of Mathematics, Ahmadu Bello University, Zaria 234, Nigeria

Abstract

This article investigates the influence of diffusion-thermo effect on transient free convective heat and mass transfer flow in a channel bounded by two infinite vertical parallel plates. Fully developed laminar flow is considered when the boundaries are subjected to symmetric concentration and thermal input. The Dufour effect is taken into consideration. The velocity, temperature, and concentration profiles are obtained analytically using the Laplace transforms technique and used to compute the shear stress, Nusselt number, and mass flux. During the course of computation, it was found that transient solution at large time coincides with steady-state solution derived separately. Diffusion-thermo (Dufour effect) is observed to create an anomalous situation in temperature and velocity profiles for small Prandtl numbers. There is also flow reversal for a small Dufour number and negative values of the sustentation parameter (N). At steady-state, there is neither heat nor mass transfer between the fluid and the plates.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Reference21 articles.

1. The Nature of Vertical Natural Convection Flows Resulting From the Combined Buoyancy Effects of Thermal and Mass Diffusion;Gebhart;Int. J. Heat Mass Transfer

2. Effects of Mass Transfer and Free Convection Currents on the Flow Past an Impulsively Started Vertical Plate;Soundalgekar;ASME J. Appl. Mech.

3. Thermal-Diffusion and Diffusion-Thermo Effects on Mixed Free-Forced Convective and Mass Transfer Boundary Layer Flow With Temperature Dependent Viscosity;Kafoussias;Int. J. Eng. Sci.

4. Diffusion-Thermo and Thermal-Diffusion Effects on Free Convective Heat and Mass Transfer Flow in a Porous Medium With Time Dependent Temperature and Concentration;Alam;Int. J. Appl. Eng. Res.

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