THERMAL SCIENCE

International Scientific Journal

Sameh E. Ahmed

,

Hakan F. Öztop

,

Mohamed Ahmed Mansour

,

Nidal Abu-Hamdeh

MAGNETOHYDRODYNAMIC MIXED THERMO-BIOCONVECTION IN POROUS CAVITY FILLED BY OXYTACTIC MICROORGANISMS

ABSTRACT
This article describes the steady magnetohydrodynamic mixed thermo-bioconvection in a square enclosure filled with a homogeneous and isotropic porous medium in the presences of oxytactic microorganisms. The model used for the oxytactic microorganisms is based on a continuum model of a suspension of oxytactic microorganisms. The mixed convection is resulting for the interaction between the buoyancy force and the moving of the top wall of the cavity with constant speed. The horizontal walls of the cavity are considered to be adiabatic while the vertical walls are differentially heated. The governing equations are solved using the finite volume method with SIMPLE technique. Comparisons with previously published works are performed and found to be in excellent agreements. It is found that the increase in both Richardson and Hartmann numbers reduces the average Nusselt and Sherwood numbers.
KEYWORDS
bioconvection, MHD, porous medium, oxytactic microorganisms
PAPER SUBMITTED: 2016-10-05
PAPER REVISED: 2016-12-22
PAPER ACCEPTED: 2016-12-22
PUBLISHED ONLINE: 2017-01-14
DOI REFERENCE: https://doi.org/10.2298/TSCI161005319A
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2018, VOLUME 22, ISSUE Issue 6, PAGES [2711 - 2721]
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Magnetohydrodynamic mixed thermo-bioconvection in porous cavity filled by oxytactic microorganisms

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence