ANALYSIS OF MoS2-SiO2/WATER HYBRID NANOFLUID FLOW WITH LINEAR AND QUADRATIC THERMAL RADIATION INDUCED BY A STRETCHING/SHRINKING SURFACE IN A DARCY-FORCHHEIMER POROUS MEDIUM

In the last two decades, many researchers have concentrated on the nanofluid boundary layer flow over a stretching/shrinking surface. The increasing energy demands and its applications have seen the focus been shifted to the hybrid nanofluid flows but so much is still left to be investigated. The present model deals with the flow of MoS2-SiO2/water hybrid nanofluid over a stretching/shrinking surface. The model is developed assuming the presence of Darcy–Forchheimer porous medium; and space and temperature-dependent heat source/sink. In addition to linear thermal radiation effect, heat transfer rate with quadratic thermal radiation effect is also studied, to focus on systems with high temperature difference. The prevailing PDEs depicting the modeled problem with aforementioned effects are transformed via similarity transformations and solved via "bvp4c" function, which is accessible by MATLAB software. The present numerical results are validated through a comparison with published literature and "bvp5c" and RKF-Shooting technique. The heat transfer coefficient is seen higher for quadratic thermal radiation than for linear thermal radiation. The streamlines pattern are seen to be curved outside and inside, for stretching and shrinking sheet, respectively. Furthermore, the presence of magnetic field have thinning consequence on the velocity boundary layer region.