Chemical Industry and Chemical Engineering Quarterly 2011 Volume 17, Issue 2, Pages: 189-198
https://doi.org/10.2298/CICEQ100829003R
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Chemical reaction and radiation effects on the transient MHD free convection flow of dissipative fluid past an infinite vertical porous plate with ramped wall temperature
Rajesh V. (Department of Mathematics, Narayana engineering college, Nellore, India)
A finite-difference analysis is performed to study the effects of thermal
radiation and chemical reaction on the transient MHD free convection and mass
transform flow of a dissipative fluid past an infinite vertical porous plate
subject to ramped wall temperature. The fluid considered here is a gray,
absorbing/emitting radiation but a non-scattering medium. The dimensionless
governing equations are unsteady, coupled and non-linear partial differential
equations. An analytical method fails to give a solution. Hence an implicit
finite difference scheme of Crank-Nicolson method is employed. The effect of
the Magnetic parameter (M), Chemical reaction parameter (K), Radiation
parameter (F), Buoyancy ratio parameter (N), Schmidt number (Sc) on the
velocity field and skin friction for both air (Pr=0.71) and water(Pr=7) in
the presence of both aiding (N>0) and opposing (N<0) flows are extensively
discussed with the help of graphs.
Keywords: first order chemical reaction, MHD, free convection, viscous dissipation, ramped temperature, thermal radiation
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