MHD Mixed Bioconvection in a Square Porous Cavity Filled by Gyrotactic Microorganisms

Mansour, M. A.; Rashad, A. M.; Mallikarjuna, B.; Hussein, Ahmed Kadhim; Aichouni, Mohamed; Kolsi, Lioua

doi:10.18280/ijht.370209

Cited by 56 publications

(18 citation statements)

References 16 publications

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“…Based on these considerations, the dimensionless governing partial differential equations for MHD thermo-bioconvection of the present study in Cartesian coordinate systems (Sheremet and Pop, 2014;Ahmed et al, 2018;Balla et al, 2018;Balla et al, 2020;Ahmed et al, 2018), Rashad et al, 2018;Mansour et al, 2019) yield as:…”

Section: Problem Description and Governing Equationsmentioning

confidence: 99%

Thermo-bioconvection of oxytactic microorganisms in porous media in the presence of magnetic field

Biswas

Datta

Manna

et al. 2020

HFF

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Purpose This study aims to explore magnetohydrodynamic (MHD) thermo-bioconvection of oxytactic microorganisms in multi-physical directions addressing thermal gradient, lid motion, porous substance and magnetic field collectively using a typical differentially heated two-sided lid-driven cavity. The consequences of a range of pertinent parameters on the flow structure, temperature, oxygen isoconcentration and microorganisms’ isoconcentration are examined and explained in great detail. Design/methodology/approach Two-dimensional governing equations in a two-sided lid-driven porous cavity heated differentially and packed with oxytactic microorganisms under the influence of the magnetic field are solved numerically using the finite volume method-based computational fluid dynamics code. The evolved flow physics is analyzed assuming a steady laminar incompressible Newtonian flow within the validity of the Boussinesq approximation. The transport of oxytactic microorganisms is formulated by augmenting the continuum model. Findings The mechanisms involved with MHD-mixed thermo-bioconvection could have potential benefits for industrial exploitation. The distributions of fluid flow, temperature, oxygen and motile microorganisms are markedly modified with the change of convection regime. Both speed and direction of the translating walls significantly influence the concentration of the motile microorganisms. The concentration of oxygen and motile microorganisms is found to be higher at the upper portion of the cavity. The overall patterns of the fluid flow, temperature and the oxygen and microorganism distributions are markedly affected by the increase of magnetic field strength. Research limitations/implications The concept of the present study could be extended to other areas of bioconvection in the presence of gravity, light or chemical attraction. Practical implications The findings of the present study could be used to multi-physical applications like biomicrosystems, pollutant dispersion in aquifers, chemical catalytic converters, geothermal energy usage, petroleum oil reservoirs, enhanced oil recovery, fuel cells, thermal energy storage and others. Originality/value The MHD-mixed thermo-bioconvection of oxytactic microorganisms is investigated under different parametric conditions. The effect of pertinent parameters on the heat and mass transfers are examined using the Nusselt number and Sherwood number.

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Section: Problem Description and Governing Equationsmentioning

confidence: 99%

Thermo-bioconvection of oxytactic microorganisms in porous media in the presence of magnetic field

Biswas

Datta

Manna

et al. 2020

HFF

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“…Ahmed et al 13 investigated the oxytactic microorganisms‐induced mixed bioconvection in an isotropic porous enclosure and reported opposite effect of Hartmann number and Richardson number on bioconvective heat transfer. Sheremet et al 14 and Mansour et al 15 studied the magnetohydrodynamic (MHD) gyrotactic bioconvection in a nanofluid‐filled square cavity. Balla et al 16 studied oxytactic bioconvection in a porous square cavity.…”

Section: Introductionmentioning

confidence: 99%

Impact of Soret and Dufour on bioconvective flow of nanofluid in porous square cavity

Balla

Alluguvelli²,

Kishan

et al. 2021

Heat Trans

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This article addresses the bioconvection in a porous cavity associated with Soret and Dufour effects. The bioconvective flow in a porous medium is based on Hillesdon and Pedley's model and is governed by nonlinear partial differential equations. These equations are transformed into a dimensionless form with suitable nondimensional parameters. The finite element method is employed to solve the dimensionless equations. The outcomes of the study are presented by streamlines, temperature distributions, isoconcentrations of solute, nanoparticles, and microorganisms. Furthermore, the tendency of average Nusselt number and average Sherwood number and the influence of Soret parameter, Dufour parameter, Peclet number, and bioconvective Rayleigh number is interpreted. Thermophoresis and Soret number show a strong effect on the concentration of nanoparticles. Brownian motion and thermophoresis exhibit a significant effect on the density distributions of microorganisms. The novelty of the paper is to combine the effects of Soret–Dufour and oxytactic bioconvection. The present study can be useful in the following applications: microbial‐enhanced oil recovery, toxin removal, antibiotics, and modeling of microfluidic devices.

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“…Knowledge of understanding the natural convective fluid flow and heat transfer in a porous media is essential due to a bunch of applications in the area of crystal growth, underground energy storage, contaminant transportation, phase change energy storage devices, fuel cells, cooling of electronic modules and others. The modeling of heat and fluid flow occurs in a porous media and their necessities can be reviewed in the lectures [1][2][3][4]. Recently, a study on quadratic natural convective effect in a lid-driven cavity of the heated bottom wall is found in the literature [5].…”

Section: Introductionmentioning

confidence: 99%

Fluid Flow and Heat Transfer Analysis of Quadratic Free Convection in a Nanofluid Filled Porous Cavity

Lawrence¹,

Kumar²

2021

IJHT

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The involvement of non-linear convection effects in a natural convective fluid flow and heat transfer along with the effects of magnetic field in a porous cavity is studied numerically. Cu-water filled cavity of higher temperature at the left wall and lower temperature at the right wall. The governing equations are organized to achieve the required flow by using two-dimensional equations of energy, continuity and momentum. Vorticity-stream function based dimensionless equations are solved using the finite difference techniques. The results are discussed for various dimensionless parameters such as the Darcy number, non-linear convection parameter, Hartmann number, Rayleigh number and solid volume fraction of the nanoparticles. An augment in streamline velocity and convection heat transfer are observed by increasing the Rayleigh number, non-linear convection parameter and Darcy number. The non-linear convection parameter has a lesser effect on the lower Rayleigh numbers. Diminished streamline intensity and reduction in convection heat transfer are noted for an increase in the strength of the applied magnetic field irrespective of the non-linear convection parameter.

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MHD Mixed Bioconvection in a Square Porous Cavity Filled by Gyrotactic Microorganisms

Cited by 56 publications

References 16 publications

Thermo-bioconvection of oxytactic microorganisms in porous media in the presence of magnetic field

Thermo-bioconvection of oxytactic microorganisms in porous media in the presence of magnetic field

Impact of Soret and Dufour on bioconvective flow of nanofluid in porous square cavity

Fluid Flow and Heat Transfer Analysis of Quadratic Free Convection in a Nanofluid Filled Porous Cavity

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