MHD nanofluid bioconvection due to gyrotactic microorganisms over a convectively heat stretching sheet

MHD laminar boundary layer flow with heat and mass transfer of an electrically conducting water-based nanofluid containing gyrotactic microorganisms along a convectively heated stretching sheet is investigated numerically. The governing equations are reduced to non-linear ordinary differential equat...

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Bibliographic Details
Published in:International journal of thermal sciences 2014-07, Vol.81 (81), p.118-124
Main Authors: Khan, W.A., Makinde, O.D.
Format: Article
Language:English
Subjects:
Applied sciences
Bioconvection
Biological and medical sciences
Buoyancy
Cell physiology
Convective heating
Density
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fluid dynamics
Fundamental and applied biological sciences. Psychology
Fundamental areas of phenomenology (including applications)
Gyrotactic microorganisms
Heat transfer
Magnetohydrodynamics
Magnetohydrodynamics and electrohydrodynamics
Mathematical analysis
Mathematical models
MHD
Microorganisms
Molecular and cellular biology
Motility and taxis
Nanofluid
Nanofluids
Nanostructure
Physics
Stretching sheet
Theoretical studies. Data and constants. Metering
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Summary:MHD laminar boundary layer flow with heat and mass transfer of an electrically conducting water-based nanofluid containing gyrotactic microorganisms along a convectively heated stretching sheet is investigated numerically. The governing equations are reduced to non-linear ordinary differential equations using Oberbeck–Boussinesq approximation and similarity transformations. The effects of the governing parameters on the dimensionless quantities like velocity, temperature, nanoparticle concentration, density of motile microorganisms, local Nusselt, and local Sherwood numbers for both nanoparticles and motile microorganism density are explored. It is found that the dimensionless velocity decreases with increasing buoyancy ratio and bioconvection Rayleigh number and the dimensionless temperature at the surface increases with an increase in the convective parameter, whereas it decreases with increasing buoyancy ratios. •Investigate nanofluids containing motile gyrotactic microorganisms.•Buongiorno model is employed with convective boundary condition.•The Nusselt numbers decrease with increasing magnetic field.•The Sherwood numbers decrease with increasing magnetic field.•The density number decreases with increasing magnetic field.
ISSN:1290-0729
1778-4166
DOI:10.1016/j.ijthermalsci.2014.03.009