Thermal analysis of bioconvective nanofluid flow over a sphere in presence of multiple diffusions and a periodic magnetic field

Abstract

The current work intends to describe the heat and mass transfer in the mixed bioconvective flow of nanofluid along the sphere. This analysis also takes into account the influences of a periodic magnetic field and the diffusions of species concentrations such as liquid ammonia and liquid hydrogen. The physical problem is represented as a collection of connected nonlinear partial differential equations with appropriate boundary constraints using the Boussinesq approximation. The Buongiorno two-phase model is utilized to examine the nanoparticle's effect on the fluid. The governing equations are represented in the dimensionless form by using nonsimilar transformations. Further, the implicit finite difference scheme and the technique of quasilinearization are employed for numerical computation. Graphs are used to discuss the findings. The skin friction coefficient increases by about 27%, and the heat transfer rate to the fluid from the surface decreases by about 30% when the periodic magnetic field escalates from 0 to 1. The nanoparticle's mass transfer rate increases by about 35% when the Lewis number grows from 5 to 10. Higher Peclet numbers are favorable to the skin friction coefficient and heat transfer rate, but not the microorganism's density number. The present numerical results obtained in this analysis were compared to earlier published work and found to be in excellent agreement.