Significance of bioconvection for nano-bio film stagnation point flow of micropolar nanofluid over stretching sheet with concentration-dependent transport properties

Abstract

A conceptual template of nano-biofilm for micropolar fluid transportation towards an elongating or dwindling sheet comprising stagnation point stream, spherical nanoparticles as well as bioconvection of gyrotactic microbes has been designed. The liquid's variable transit assets (dynamic viscosity, spin gradient viscosity, heat capacity, nanoparticle mass diffusivity) and microbes (species diffusivity) are attributed. The nonlinear systems of partial differential computations are modified into nonlinear standard differential equations employing a similarity transformation. The shooting technique and RK-4 approach is utilized to acquire numeric results. The influence of varied fluid transfer properties and distinct factors on velocity, microrotation, heat, concentration and motile concentration distributions are graphically depicted. A decreasing velocity profile has been noticed with the variation of parameters M, K, Kp, Nr and Rb; however, ω displays a twisting velocity pattern. An enhancing variation in microrotation velocity seen for magnetic and microrotation parameters. Brownian motion, source of heat, thermophoresis and heat capacity factors improve the temperature field. For the varying viscosity parameter, the velocity pattern diminishes, whereas the velocity, temperature and concentration profiles enhance the thermal conductivity factor. For the variable transit factors, all physical quantities drop significantly. The microstructural model of fluid particles in micropolar fluids provides an efficient mathematical model for simulating the flow attributes of actual and complex fluids such as polymeric preservatives, colloidal dispersions, fluid crystals, animal blood, esoteric lubricants, and so on that the framework of classical hydrodynamics' Navier–Stokes equations cannot flawlessly characterize. Numerous literature reviews dealing with the incompressible movement of micropolar fluid towards an elongated sheet are available in open publications, and they play an important role in engineering disciplines.