Effect of Thermal Radiation and Variable Viscosity on Bioconvective and Thermal Stability of Non-Newtonian Nanofluids under Bidirectional Porous Oscillating Regime

The bioconvective flow of a Jeffrey fluid conveying tiny particles under the effect of an oscillating stretched bidirectional surface is considered in this paper. The effects of thermal radiation and a porous medium are also investigated. The Cattaneo-Christov diffusion theories are used to analyze the heat and mass transfer phenomena. The activation energy effects are included in the concentration equation. The solved dimensionless equations system is established, based on non-dimensional variables. The analytical findings are evaluated using the homotopic analysis technique. The convergence of solutions is ensured. The results are validated by already available published findings and a good concordance is encountered. The fundamental physical aspect of flow parameters is graphically evaluated. The main results reveal that the velocity is reduced by increasing the permeability of the porous medium. An increase in the temperature occurs when the viscosity of the fluid is varied. The obtained results can be useful in thermal systems, energy production, heat transfer devices, solar systems, biofuels, fertilizers, etc.

Automated summary

This paper studies the bioconvective flow of a Jeffrey fluid conveying tiny particles under the effect of an oscillating stretched bidirectional surface, considering the effects of thermal radiation and a porous medium. The heat and mass transfer phenomena are analyzed using the Cattaneo-Christov diffusion theories, and the concentration equation includes the activation energy effects. The solved dimensionless equations system is established based on non-dimensional variables, and the homotopic analysis technique is used to evaluate the analytical findings and ensure the convergence of solutions. The results are validated and show good concordance with existing literature, and the graphical evaluation of flow parameters reveals important physical aspects. The obtained results have practical significance in thermal systems, energy production, heat transfer devices, solar systems, biofuels, fertilizers, etc.