Performance of packed columns: V. Effect of solute concentration on gas-phase mass transfer rates

In this paper, we study the effects of nonlinear convection and thermophoresis in steady boundary layer flow over a vertical impermeable wall in a non-Darcy porous medium. Both the fluid temperature and the solute concentration are assumed to be nonlinear while at the wall, both the temperature and concentration are maintained at a constant value. A similarity transformation was used to obtain a system of nonlinear ordinary differential equations, which were then solved numerically using the Matlab bvp4c solver. A comparison of the numerical results with previously published results for special cases shows a good agreement. The effects of the nonlinear temperature and concentration parameters on the velocity and heat and mass transfer are shown graphically. A representative sample of the results is presented showing the effects of thermophoresis on the fluid velocity and heat and mass transfer rates. It is found among other results, that the concentration profiles decreased with increasing values of the thermophoretic parameter.

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Effect of Wetting Agent on Liquid Phase Mass Transfer Rates in Packed Columns

Chemical engineering ◽

10.1252/kakoronbunshu1953.24.9 ◽

1960 ◽

Vol 24 (1) ◽

pp. 9-11

Author(s):

H Hikita

Keyword(s):

Mass Transfer ◽

Liquid Phase ◽

Packed Columns ◽

Wetting Agent ◽

Liquid Phase Mass Transfer ◽

Transfer Rates

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Nanofluid Flow over a Permeable Surface with Convective Boundary Conditions and Radiative Heat Transfer

Mathematical Problems in Engineering ◽

10.1155/2013/201219 ◽

2013 ◽

Vol 2013 ◽

pp. 1-11 ◽

Cited By ~ 8

Author(s):

P. K. Kameswaran ◽

P. Sibanda ◽

A. S. N. Murti

Keyword(s):

Mass Transfer ◽

Boundary Conditions ◽

Heat And Mass Transfer ◽

Volume Fraction ◽

Solute Concentration ◽

Skin Friction Coefficient ◽

Convective Boundary Conditions ◽

Nanofluid Flow ◽

Convective Boundary ◽

Transfer Rates

We investigate the effects of thermal radiation and convective boundary conditions on heat and mass transfer in nanofluid flow over a permeable flat plate. The mathematical model for the nanofluid incorporates variations in the nanoparticle volume fraction of up to 20%. The performance of two water-based nanofluids, namely, stable suspensions of copper and gold nanoparticles in water was investigated. The governing partial differential equations were transformed into ordinary ones using a similarity transformation and solved numerically. The numerical results were validated by comparison with previously published results in the literature. The main focus of this paper is to study the fluid and surface parameters such as the radiation parameter, and suction/injection parameter, solute concentration profiles, as well as the skin friction coefficient and heat and mass transfer rates were conducted.

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