Shape-dependent thermal transport in bioconvective dissipative flow of hybrid nanofluid with Cattaneo–Christov heat flux

Thermal performance of lubricant-based hybrid nanomaterial has attracted significant attention due to their potential for advanced heat transfer applications. However, the combined effects of nanoparticle shape, dissipation features, thermal radiation, bioconvection, heat source and non-Fourier’s heat flux model have not been studied within a unified framework. This investigation analyses the bioconvective dissipative flow of a lubricant-based hybrid nanofluid confined by a porous stretching surface. The hybrid nanofluid is prepared by dispersing zinc oxide (ZnO) and molybdenum disulphide (MoS 2 ) nanoparticles in SAE10W-30 engine oil. The mathematical model accounts the nonlinear radiated effects, internal heat source, viscous dissipation, and motile microorganisms, while heat transport is characterized using the Cattaneo–Christov heat flux model. The transformed system of equations has been solved numerically with help of shooting scheme. The assessment of five nanoparticle shapes (sphere, platelet, blade, brick, and cylinder) on the flow, thermal, concentration, and microorganism distributions are focused for both mono and hybrid nanofluids. The results claim that thermal radiation and internal heat generation significantly improve the thermal profile, whereas viscous dissipation further elevates fluid temperature due to frictional heating. The blade-shaped nanoparticles provide the highest thermal enhancement among the considered geometries. These findings demonstrate the important role of nanoparticle geometry and hybridization in improving thermal transport characteristics under non-Fourier heat conduction.