Significance of multi-slips and thermal radiation for unsteady MHD nanofluid flow subject to gyrotactic microorganisms and Cattaneo–Christov heat flux model over a stretching sheet

Abstract

This study considered the Cattaneo–Christov heat flux for examining the nanofluid flow with heat transfer towards a stretching sheet involving thermal and solutal buoyancy, activation energy, thermal radiation, and microorganism concentration. It is suggested that the model of Buongiorno nanofluid can be used to sync the influences of thermophoresis and Brownian motion. The 2D boundary layer with non-Fourier PDEs is converted into 1D nonlinear ODEs. Using the RK-4 method, the acquired equations were analyzed numerically. In this regard, the relevant engineering quantities are extensively computed with a higher degree of precision and then tabulated. The motile concentration, temperature, nanoparticles concentration, and velocity decline for numerous values of involved parameters such as slips of microorganism concentration, thermal, solutal, and hydrodynamic, respectively. The temperature field decreased when the parameter of thermal relaxation was imposed, while the reverse behavior was shown for thermophoresis, radiation parameter, and Brownian motion. The current results manifest a reasonable assessment of their existing counterparts.