Unsteady Boundary Layer Flow And Heat Transfer In Nanofluids With Microorganisms
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Date
2018-01
Authors
Mohd Basir, Mohammad Faisal
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
Boundary layer flows involving microorganism have attracted attention in
recent years. Several problems involving such flows are investigated in detail in this
thesis. The problems involve two dimensional laminar convective and threedimensional
boundary layer flow with heat, mass and microorganism transfer under
various physical configurations in the presence of velocity slip, thermal slip, mass slip,
microorganism slip, Stefan blowing and zero mass flux boundary conditions. The fluid
is assumed to be Newtonian (water), viscous, incompressible and has constant or
variable transport properties. Only unsteady boundary layers immersed in a nanofluid
has been taken into consideration. In order to solve these problems, the dimensional
partial differential equations that govern the flow are transformed into dimensionless
equations by using appropriate similarity transformations. Similarity variables are
used to reduce the partial differential equations to a system of nonlinear semi-coupled
ordinary differential equations. The transformed equations are solved numerically
using the shooting method utilizing Runge-Kutta-Fehlberg fourth-fifth order method.
The effects of the governing parameters on the dimensionless velocity, temperature,
nanoparticle volume fraction, density of motile microorganisms, skin friction
coefficient, local Nusselt number, local Sherwood number and motile density of
microorganisms transfer rate are illustrated graphically and in tabular form. It was
found that the controlling parameters strongly affect the fluid flow and heat transfer
characteristics. We compared our numerical results with published results for some
limiting cases and found excellent agreement.
Description
Keywords
Unsteady boundary layer flow and heat transfer , in nanofluids with microorganisms