Influence of Variable Thermal Properties on Bioconvective Flow of a Reiner-Rivlin Nanofluid with Mass Suction: A Cattaneo-Christov Framework

This study explores the bioconvective behavior of a Reiner-Rivlin nanofluid, accounting for spatially varying thermal properties. The flow is considered over a porous, stretching surface with mass suction effects incorporated into the transport analysis. The Reiner-Rivlin nanofluid model includes variable thermal conductivity, mass diffusivity, and motile microorganism density to accurately reflect realistic biological conditions. Radiative heat transfer and internal heat generation are considered in the thermal energy equation, while the Cattaneo-Christov theory is employed to model non-Fourier heat and mass fluxes. The governing equations are non-dimensionalized to reduce complexity, and a numerical solution is obtained using a shooting method. Parametric studies are conducted to examine the influence of key dimensionless parameters on velocity, temperature, concentration, and motile microorganism profiles. The results are presented through a series of graphs, offering insight into the dynamic interplay between physical mechanisms affecting heat and mass transfer in non-Newtonian bioconvective nanofluid systems.