Latiff, Nur Amalina Abdul
(2018)
Mathematical Modelling Of
Unsteady Nanofluid Flow For Heat,
Mass And Microorganism Transfers
With Magnetic And Slip Effects.
PhD thesis, Universiti Sains Malaysia.
Abstract
The study of flow problems related to the magnetic field, nanofluid, and
microorganism are important especially in microfluidic devices. The advantages of
microfluidic devices are its small size, low cost, and low consumption, especially for
biological studies. The microorganisms in the nanofluid are essential to prevent
nanoparticle agglomeration, to improve the stability of the nanofluids, to enhance
mixing and hence enhance mass transfer in microfluidic devices. This thesis
investigates the modified mathematical models to study the boundary layer flow for
heat, nanoparticle mass, and microorganism transfers in the biochemical process
involving microfluidic devices. Specific nanofluid flow problems under various
geometries such as flow over stretchable/shrinkable rotating disk, flow between two
parallel disks, flow over a vertical rotating cone, and micropolar nanofluid flow over
a stretching/shrinking sheet were investigated. The effects of magnetic, Stefan
blowing, and various slips (velocity slip, thermal slip, nanoparticle mass slip, and
microorganism slip) were incorporated into the models. Both the Newtonian and non-
Newtonian (micropolar) nanofluids have been taken into account. Appropriate
transformations have been used to transform the partial differential equations into
nonlinear ordinary differential equations. The differential equations have been solved
numerically using the finite difference method coupled with
the Richardson extrapolation technique in Maple software
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