Magnetic field and viscous dissipation effect on bioconvection in a permeable sphere embedded in a porous medium with a nanofluid containing gyrotactic micro-organisms

被引:31
作者
Shaw, Sachin [1 ]
Motsa, Sandile S. [2 ]
Sibanda, Precious [3 ]
机构
[1] Botswana Int Univ Sci & Technol, Dept Math & Stat Sci, Private Bag 16, Palapye, Botswana
[2] Univ Swaziland, Dept Math, Kwaluseni, Swaziland
[3] Univ KwaZulu Natal, Sch Math Stat & Comp Sci, Pietermaritzburg, South Africa
来源
HEAT TRANSFER-ASIAN RESEARCH | 2018年 / 47卷 / 05期
关键词
bioconvection; gyrotactic micro-organism; magnetic field; nanofluid; permeable sphere; viscous dissipation;
D O I
10.1002/htj.21337
中图分类号
O414.1 [热力学];
学科分类号
摘要
Micro-organisms play a vital role to understand the ecological system and therefore it is very important to understand the behavior of micro-organism due to different parameters. In the present paper, we investigated the bioconvection about a permeable sphere with constant surface temperature embedded in a porous medium filled with a water-based nanofluid containing gyrotactic micro-organisms. The convection and movement of the micro-organisms are constrained or assisted by thermophoresis, viscous dissipation effects, and an applied magnetic field. First, we have used the similarity transformation to simplify the governing equations. Then, we have solved the governing nonlinear partial differential equations numerically using a recent spectral relaxation method. The effects of the significant parameters on the local density of the gyrotactic micro-organisms have been determined and discussed. It is observed that by introducing the magnetic field in the system, the skin friction, local nanoparticle Sherwood number, and the local density of the micro-organism decrease, while the last two governing parameters show a positive response with increase in the viscous dissipation.
引用
收藏
页码:718 / 734
页数:17
相关论文
共 50 条
[11]   Impact of Dual Solutions on Nanofluid Containing Motile Gyrotactic Micro-organisms with Thermal Radiation [J].
De, Poulomi .
BIONANOSCIENCE, 2019, 9 (01) :13-20
[12]   Framing the impact of external magnetic field on bioconvection of a nanofluid flow containing gyrotactic microorganisms with convective boundary conditions [J].
Chakraborty, Tanmoy ;
Das, Kalidas ;
Kundu, Prabir Kumar .
ALEXANDRIA ENGINEERING JOURNAL, 2018, 57 (01) :61-71
[13]   A BIO-THERMAL CONVECTION IN A POROUS MEDIUM SATURATED BY NANOFLUID CONTAINING GYROTACTIC MICROORGANISMS UNDER AN EXTERNAL MAGNETIC FIELD? [J].
Kopp, Michael I. ;
Yanovsky, Volodymyr V. ;
Mahabaleshwar, Ulavathi S. .
EAST EUROPEAN JOURNAL OF PHYSICS, 2022, (04) :23-47
[14]   Viscous Dissipation and Joule Heating Effects on MHD Bioconvection Flow of a Nanofluid Containing Gyrotactic Microorganisms Over a Vertical Isothermal Cone [J].
Nabwey, Hossam A. ;
El-Kabeir, S. M. M. ;
Rashad, A. M. ;
Abdou, M. M. M. .
JOURNAL OF NANOFLUIDS, 2020, 9 (03) :242-255
[15]   Thermomagnetic Bioconvection Flow in a Semitrapezoidal Enclosure Filled With a Porous Medium Containing Oxytactic Micro-Organisms: Modeling Hybrid Magnetic Biofuel Cells [J].
Venkatadri, K. ;
Rajarajeswari, P. ;
Beg, O. Anwar ;
Prasad, V. Ramachandra ;
Leonard, H. J. ;
Kuharat, S. .
ASME JOURNAL OF HEAT AND MASS TRANSFER, 2025, 147 (05)
[16]   Effect of inclination angle on bioconvection in porous square cavity containing gyrotactic microorganisms and nanofluid [J].
Balla, Chandra Shekar ;
Bodduna, Jamuna ;
Kumari, S. V. H. N. Krishna ;
Rashad, Ahmed M. .
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE, 2022, 236 (09) :4731-4747
[17]   Influence of Chemical Reaction and Nonlinear Thermal Radiation on Bioconvection of Nanofluid Containing Gyrotactic Microorganisms with Magnetic Field [J].
Pal D. ;
Mondal S.K. .
BioNanoScience, 2018, 8 (4) :1065-1080
[18]   Bioconvection in a Convectional Nanofluid Flow Containing Gyrotactic Microorganisms over an Isothermal Vertical Cone Embedded in a Porous Surface with Chemical Reactive Species [J].
Rao, M. Venkata Subba ;
Gangadhar, K. ;
Chamkha, Ali J. ;
Surekha, P. .
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING, 2021, 46 (03) :2493-2503
[19]   Bioconvection in a Convectional Nanofluid Flow Containing Gyrotactic Microorganisms over an Isothermal Vertical Cone Embedded in a Porous Surface with Chemical Reactive Species [J].
M. Venkata Subba Rao ;
K. Gangadhar ;
Ali J. Chamkha ;
P. Surekha .
Arabian Journal for Science and Engineering, 2021, 46 :2493-2503
[20]   Three-dimensional magnetohydrodynamic (MHD) flow of Maxwell nanofluid containing gyrotactic micro-organisms with heat source/sink [J].
Ali, Aamir ;
Sulaiman, M. ;
Islam, S. ;
Shah, Zahir ;
Bonyah, Ebenezer .
AIP ADVANCES, 2018, 8 (08)