Computational Exploration of Gyrotactic Microbes and Variable Viscosity Effects on Flow of Chemically Reactive Nanofluid

The main purpose of this study is to concentrate on a numerical study of boundary layer flow of magnetized nanofluid with viscosity variable through nonlinear porous surface with convective boundary conditions and gravitational body forces. Moreover, the impact of chemical diffusion and heat absorption/generation is discussed. Further, the influence of thermal radiation and bioconvections is part of this investigation. For motivation, the Brownian motion and thermophoresis effects are also considered. Appropriate similarity variables are used to transform the governing modeled PDEs into a couple of highly nonlinear ODEs. A numerical approach based on the shooting method with MATLAB bvp4c built-in function is employed for solution of the set of resulting ODEs and acquired outcomes are compared with a previous study, which illustrates an exceptional agreement. The impact of physical parameters like magnetic field, bioconvective Peclet number, Prandtl number, Brownian motion, Schmidt number, thermal radiation, thermophoresis, and nonlinear stretched surface parameter on dimensionless velocity, concentration, temperature, and density fields are discussed through graphs and tables. We declared that the temperature curve declined for growing value of Prandtl number. Moreover, significant declination is observed in density function for growing value of bioconvective Peclet number and bioconvective Lewis number. Bioconvection can be used in daily life applications, such as the environmentally-friendly, biological polymer synthesis and pharmaceutical industry.