Radiation‐Absorptive Heat Transport in Buoyancy‐Driven MHD Nanofluids Flow With Cross‐Diffusion and Chemical Interaction Effects Over a Vertical Moving Plate

ABSTRACT This article investigates the Soret–Dufour cross‐diffusion effects on radiation‐absorptive unsteady free‐convection of magnetized nanofluids ( and ) flow over a vertical moving permeable plate. The model integrates thermal source, chemical reactions, porous resistance, and thermal radiation. The water‐based nanofluids mixing two different nanoparticles and are adopted in this analysis due to their superior heat transfer characteristics. The ultimate systematized set of nondimensional partial derivatives determined via the appropriate transformations and then tackled by the computational technique of finite difference semi‐implicit scheme. The pertinent results concerning the impacts of emerging parameters on the flow fields including the skin‐friction, thermal, and mass gradients are explained by graphical and tabular formats. The final outcomes unveiled that temperature field condensed for both nanofluids by thermal radiation, but contrary progress was remarked with thermal source, nanoparticle's concentration, radiation absorption, and Dufour effects. The velocity field profiles expanded due to the thermal source, radiation absorption, and cross‐diffusion effects for both nanofluids whereas converse trend was detected by the magnetic field, nanoparticle's concentration, and radiation. An upsurge in the Schmidt number and reactive reagent caused to depreciate concentration field for both nanofluids. The skin‐friction raised at the wall for both nanofluids by Soret and Dufour impacts, but magnetic field exposed opposite effect. Likewise, heat transfer rate amplified at the wall by thermal source, Dufour effect, and thermal radiation. Remarkably, heat transfer rate raised‐up to when dissolving of nanoparticles in base‐fluid water, but for the same amount of nanoparticles, it was significantly raised up to . Further, higher velocity, temperature and concentration profiles are detected for nanofluid than the nanofluid.