Publicado 12 números por año
ISSN Imprimir: 1091-028X
ISSN En Línea: 1934-0508
Indexed in
NANOFLUID BIOCONVECTION IN POROUS MEDIA: OXYTACTIC MICROORGANISMS
SINOPSIS
This paper investigates a new type of a nanofluid that contains, in addition to nanoparticles, oxytactic motile microorganisms. One of the paradigmic problems, the Horton−Rogers−Lapwood problem (i.e., the stability of a horizontal fluid-saturated porous layer of finite depth), is solved for this new nanofluid. The stability of this nanofluid is controlled by three agencies: the nanoparticle distribution, the density stratification induced by the vertical temperature gradient, and the density stratification induced by upswimming of oxytactic microorganisms. Both non-oscillatory and oscillatory instability situations are investigated. Oscillatory instability is shown to be possible when the nanoparticle distribution is stabilizing (bottom heavy) and the vertical temperature variation is destabilizing (heating from the bottom). It is also shown that the presence of oxytactic microorganisms makes the suspension less stable but tends to destroy the oscillatory instability in favor of non-oscillatory instability.
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Ahmad Sohail, Younis Jihad, Ali Kashif, Rizwan Muhammad, Ashraf Muhammad, Abd El Salam Mohamed A., Rahimi-Gorji Mohammad, Impact of Swimming Gyrotactic Microorganisms and Viscous Dissipation on Nanoparticles Flow through a Permeable Medium: A Numerical Assessment, Journal of Nanomaterials, 2022, 2022. Crossref
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Zhou Shuang-Shuang, Ramzan Muhammad, Howari Fares, Kadry Seifedine, Chu Yu-Ming, Malik M Y, 3D Bio-convective nanofluid Bödewadt slip flow comprising gyrotactic microorganisms over a stretched stationary disk with modified Fourier law, Physica Scripta, 96, 7, 2021. Crossref
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Nield Donald A., Bejan Adrian, Internal Natural Convection: Heating from Below, in Convection in Porous Media, 2017. Crossref