Hydrothermal performance of hybrid nanofluid flow over an exponentially stretching sheet influenced by gyrotactic microorganisms: A comparative evaluation of Yamada-Ota and Xue models

Abstract

The analysis in this study focuses on comparing Yamada-Ota and Xue models for SWCNT-MWCNT/H₂O hybrid nanofluid flow with motile gyrotactic microorganisms over an exponentially stretching sheet incorporating chemical reaction and thermal radiation. By employing similarity transformations, the flow equations are solved utilizing MATLAB’s “bvp4c” solver to perform numerical analysis and obtain solutions. The analysis conducted through graphical investigation, involves the examination of the impact of numerous parameters and their influence on the distributions of momentum, thermal, nanoparticles concentration, motile microorganisms’ density, drag coefficient, heat, and mass transfer. The observations show that with viscous dissipation parameter, temperature ratio parameter, radiation parameter, and Brownian motion parameter rise, there is a reduction in the density of motile microorganisms and concentration profiles in both the Yamada-Ota and Xue models. Moreover, the Yamada-Ota model demonstrates higher temperature profiles compared to the Xue models due to Eckert number, radiation parameter, heat generation/absorption parameter, temperature ratio, and thermophoresis parameter.

Keywords:

• Bioconvection
• exponentially stretching sheet
• hybrid nanofluid
• thermal radiation
• Xue model
• Yamada-Ota model

Disclosure statement

No potential conflict of interest was reported by the author.