THERMAL SCIENCE

International Scientific Journal

Chakravarthula S. K Raju

,

Naramgari Sandeep

,

Mohamed E. Ali

,

Abdullah O. Nuhait

HEAT AND MASS TRANSFER IN 3-D MHD WILLIAMSON-CASSON FLUIDS FLOW OVER A STRETCHING SURFACE WITH NON-UNIFORM HEAT SOURCE/SINK

ABSTRACT
A mathematical model has been proposed for investigating the flow, heat, and mass transfer in Williamson and Casson fluid-flow over a stretching surface. For controlling the temperature and concentration fields we considered the space and temperature dependent heat source/sink and homogeneous-heterogeneous reactions, respectively. Numerical results are carried out for this study by using Runge-Kutta based shooting technique. The effects of governing parameters on the flow, heat and mass transfer are illustrated graphically. Also computed the skin-friction coefficients for axial and transverse directions along with the local Nusselt number. In most of the studies, homogeneous-heterogeneous profiles were reduced into a single concentration equation by assuming equal diffusion coefficients. For the physical relevance, without any assumptions we studied the individual behavior of the homogeneous-heterogeneous profiles. It is found that the rate of heat and mass transfer in Casson fluid is significantly large while equated with the heat and mass transfer rate of Williamson fluid.
KEYWORDS
MHD, non-Newtonian fluid, stretching sheet, non-uniform heat source/sink, homogeneous-heterogeneous reactions
PAPER SUBMITTED: 2016-04-26
PAPER REVISED: 2017-04-03
PAPER ACCEPTED: 2017-04-05
PUBLISHED ONLINE: 2017-05-06
DOI REFERENCE: https://doi.org/10.2298/TSCI160426107R
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Issue 1, PAGES [281 - 293]
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Heat and mass transfer in 3-D MHD Williamson-Casson fluids flow over a stretching surface with non-uniform heat source/sink

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