Staff Members - Benha University
Comments on “Variable fluid properties and variable heat flux effects on the flow and heat transfer in a non-Newtonian Maxwell fluid over an unsteady stretching sheet with slip velocity” by Ahmed M. Megahed, Chin. Phys. B Vol. 22, No. 9 (2013) 094701
researchgate.net • 2015
Publication Information
Authors
Mostafa A. A. Mahmoud
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Journal
researchgate.net
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publication.type
International
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Abstract
Recently, Megahed [1] numerically investigated the influences of variable
viscosity and thermal conductivity on the boundary layer flow and heat transfer
of a non-Newtonian Maxwell fluid over an unsteady stretching sheet with
variable heat flux in the presence of slip velocity. The main aim of the
boundary layer flow and heat transfer study is to calculate the physical
quantities of interest namely, the local skin-friction coefficient and the surface
heat flux. Unfortunately, the definitions of these quantities and the boundary
condition 1 ) 0 ( ' − = θ are wrong .
viscosity and thermal conductivity on the boundary layer flow and heat transfer
of a non-Newtonian Maxwell fluid over an unsteady stretching sheet with
variable heat flux in the presence of slip velocity. The main aim of the
boundary layer flow and heat transfer study is to calculate the physical
quantities of interest namely, the local skin-friction coefficient and the surface
heat flux. Unfortunately, the definitions of these quantities and the boundary
condition 1 ) 0 ( ' − = θ are wrong .