Thermal Characteristics of Bioconvective Flow of a Shear-thinning Fluid Conveying Nanoparticles and Gyrotactic Cells within a Stratified Region

Abstract

Thermal stratification in solar thermal systems is important for energy extraction and storage, as well as for improving the efficiency and utilization of the trapped heat energy, leading to better economic feasibility for renewable energy sources. The significance of triple stratification with the Cattaneo-Christov model in the bio-convective nanoparticles flow of thixotropic fluid coexisting with gyrotactic microorganisms is presented in this study. The incorporation of the Cattaneo-Christov heat and mass flux into the fluid model allows for a more precise prediction of heat and mass phenomena in the fluid system. The governing partial differential equations describing fluid flow are parametrized to produce a system of ordinary differential equations. Using the Optimal Homotopy Analysis Method (OHAM), the series solutions are obtained. The effects of selected pertinent parameters on the various profiles are revealed and properly reported. It is envisioned that larger values of thermal stratification result in a decrease in temperature and concentration distribution when, 𝑆0 = 𝑆𝑧 = 0.1 and 𝑁𝑏 = 𝑁𝑡 = 0.5.