Bioconvective thermal estimation of radiative micropolar nanofluid with mass suction and variable Brownian diffusion: Cattaneo–Christov model

Abstract

Abstract Owing to enhanced thermal characteristics of nanomaterials, widespread applications are suggested in the heat transfer systems, automotive industry, renewable energy sector, air conditioning, solar collectors etc. This analysis aims to disclose the bioconvective significance of micropolar nanofluid under the assumptions of variable thermal quantities. The variable role thermal conductivity, Brownian diffusivity and motile density have been incorporated. The flow induction is based on porous moving stretched surface in presence of mass suction effects. The chemical reaction and radiative effects are endorsed to the concentration and energy equation, respectively. Furthermore, the modified flux and Fick’s theories are implemented to update the heat and concentration expressions. The problem is tackled under the convective thermal constraints. The numerical simulations are adopted via shooting scheme with confirmation of accuracy. The results are interpreted physically. Based on deduced results, some novel applications of problem have been claimed. It has been observed that the micro-rotation declines by increasing the mass suction parameter for both stronger and lower concentration phenomena. Change in vortex viscosity parameter leads to reduction of temperature profile. Moreover, microorganisms profile enhances due to vortex viscosity constant.

Keywords

• Micropolar nanofluid
• Microorganisms
• Cattaneo–Christov model
• Mass suction
• Variable thermal features