Bioconvection due to gyrotactic microbes in a nanofluid flow through a porous medium

Abstract

The addition of gyrotactic microbes in the nanoparticles is essential to embellish the thermal efficiency of many systems such as microbial fuel cells, bacteria powered micro-mixers, micro-volumes like microfluidics devices, enzyme biosensor and chip-shaped microdevices like bio-microsystems. Porous media also plays a pivotal role in augmentation of the thermal efficiency. Our approach in the present work is to offer a novel study of bioconvection due to gyrotactic microbes in a nanofluid flow comprising thermal radiation within a porous media over a nonlinear shrinking/stretching surface. The entire coupled system involving nonlinear equations is tackled by means of Successive over Relaxation technique. The impacts of the involved parameters on the flow, motile microbes diffusion rate, mass and heat transfer rates are examined and shown through diagrams and tables. Comparisons with graphical and tabular data are provided and observed to be in a good agreement. Numerical results evidently point out that the motile microbes parameter and the bioconvection Peclet number elevate the motile microorganisms’ density whereas the thermal radiation phenomenon enhances the temperature.

Simulation analysis of MHD hybrid CuAl 2 O 3 /H 2 O nanofluid flow with heat generation through a porous media

“…The parameters of the problem are the porosity parameter the Prandtl number the heat generation parameter the suction parameter the magnetic parameter the induced magnetic field parameter and the reciprocal magnetic Prandtl number These parameters are all dimensionless groups of material and flow properties, and/or geometric dimensions of the domain. The traditional way (eg, Lok et al 39 and Ahmad et al 40,41 ) of studying flow and thermal characteristics of the fluid dynamics problems is to specify the values of these dimensionless groups rather than specifying the particular fluid properties and the domain dimensions. Obviously, the results obtained in this way are applicable to the flow problems with particular values of material properties and the dimensions of the domain, falling in the ranges considered in the studies.…”

Impact of Swimming Gyrotactic Microorganisms and Viscous Dissipation on Nanoparticles Flow through a Permeable Medium: A Numerical Assessment

“…An ambient concentration of microbes as well as ambient concentration and temperature of the fluid far away from the surface of sheet is represented by N ∞ , C ∞ , and T ∞ (see Figure 1). The relevant equations of the problem, in case of porous media and viscous dissipation, may be composed as [24][25][26][27]…”

Numerical Assessment of Dipole Interaction with the Single-Phase Nanofluid Flow in an Enclosure: A Pseudo-Transient Approach

“…The elements of nanoparticles comprise oxides, carbides, nitrides, and metals such as SiO 2 , CuO, SiN, SiC, Au, Fe, and Cu. With improved and enhanced thermal mechanisms, nanofluids have enormous employments involving thermal storage capacity, nuclear system cooling, vehicle engine cooling, welding cooling, high power lasers, and are used in supersonic and ultrasonic fields, gas recovery of boiler exhaust fuel, tumor and cancer therapy, pharmacology, refrigerator, drag reduction, grinder machines, hybrid power engines, fuel cells, car AC, microelectronic chips, and microwave tubes [3]. Various recent investigations regarding nanofluids subject to various conditions have been studied in [4][5][6][7][8][9][10].…”