ACTIVATION ENERGY PROCESS IN BIOCONVECTION NANOFLUID FLOW THROUGH POROUS CAVITY

This article reports the activation energy process in thermo-bioconvection flow via porous media within the four-sided cavity filled with gyrotactic microorganisms and nanofluid. The Darcy model with Boussinesq approximation is utilized for the momentum equation in porous medium. The Pedley and Kessler model is utilized for the concentration equations of gyrotactic microorganisms. The finite-difference approach is employed to solve the converted equations. The influence of significant quantities such as activation energy (E), temperature difference (delta), chemical reaction (omega), Peclet number (Pe), Brownian motion (Nb), and buoyancy ratio (Nr) is discussed. Further, the mean quantities of Nusselt number, average Sherwood numbers of microorganisms, and nanoparticles are interpreted at the hot wall. It is determined that the Peclet number and activation energy show a destabilizing effect on the isoconcentrations of nanoparticle volume fraction and microorganisms. A significant effect on the bioconvection and heat transfer is noticed against the activation energy, temperature difference, and chemical reaction parameters.