Analysis of Magneto-Thermo-Bioconvection of Nanofluid Containing Gyrotactic Microorganisms Through Porous Media

Abstract

The present work aims to study the combined effect of external magnetic field and heating from below on the bioconvection of nanofluid containing gyrotactic microorganisms. Modified Maxwell’s equations and generalized Buongiorno’s model are used to frame the flow constitutive equations of nanofluid saturated in the Darcy-Brinkman porous medium. The present investigation has been done in the framework of linear stability. The resulting eigenvalue problem along with boundary conditions has been solved using Chebyshev-Gauss-Lobato Spectral Method. Appropriate transformations are used to convert Neumann boundary conditions into Dirichlet’s one. The influence of various pertinent parameters on the critical thermal Rayleigh number has been shown through graphs and tables. It has been observed that magnetic field stablizes the system whereas fast moving microorganisms hasten the onset of convection.

Heat transfer analysis in a horizontal anisotropic porous channel with Bi-viscous Bingham nanofluid and temperature-dependent Brownian diffusion

“…Throughout the study, the relative accepted error is set to 10 –6 , and graphical results are obtained for the momentum, thermal, and nanoparticle concentration profiles, as well as other physical quantities of engineering interest. The fixed values of the non-dimensional flow characterizing parameters [ (Bisht and Sharma, 2019; Sanjalee and Sharma, 2022; Sanjalee et al ., 2022a)? ] are chosen as follows: ξ = 0.3, κ = 0.3, Na = 5, Nb = 0.5, Le = 0.1, Da = 0.2, β * = 5, and Re = 10.The velocity profile in the absence of nanofluid and temperature are compared with the velocity profile obtained by Vajravelu and Kumar (2004) for K = 0, λ = 1, M = 1, and R = 0.1.…”

Convective instability of blood‐based Au‐Fe3O4 hybrid nanoliquid under the presence of magnetic field with internal heat source: Application to cancer treatment

“…Kenjeres and Righolt [33] concluded that particle capturing efficiency in the targeted region increases due to magnetically targeted drug delivery. Sanjalee and Sharma [34] investigated the effect of the magnetic field on the onset of bioconvection due to gyrotactic microorganisms.…”