Double-Diffusivity Heat Generation Effects on Bioconvection Process Embedded in a Vertical Porous Surface with Variable Fluid Properties
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Date
2020
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Journal of Thermal Analysis and Calorimetry
Abstract
The present paper concerns the bioconvective flow, mass and heat transfer including motile
microorganisms on a vertical surface saturated with porous materials of variable porosity. Because of
variable porosity, other fluid properties are assumed to be porosity-dependent. The physical laws that
govern the fluid flow and microorganism concentration are modeled into a set of coupled partial
differential equations and simplified into corresponding nonlinear ordinary differential equations with
similarity variables. Numerical solutions are obtained using in-built functions in Maple 14.0 to ease the
hardship connected with computational complexity in the nonlinear problem. Graphical solutions of the
symbolic results are presented and fully explained in accordance with the physics of the fluid for the
velocity, temperature, concentration and motile microorganism density profiles for uniform and variable
permeability and also in porous, non-porous cases. Mixed convective parameter λ has pronounced
effect on heat mass and motile microorganism transfer rate in case variable permeability with porous
surface.
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Keywords
Porosity dependence, Gyrotactic microorganism, Bioconvection, Variable properties, Porous medium