Computational Analysis of MHD Nonlinear Radiation Casson Hybrid Nanofluid Flow at Vertical Stretching Sheet

The stagnation point flow of unsteady compressible Casson hybrid nanofluid flow over a vertical stretching sheet was analyzed. The comparative study of Yamada Ota, Tiwari Das, and Xue hybrid nanofluid models was performed. The Lorentz force was applied normal to flow directions. The effect of nonlinear radiation was studied. We considered the SWCNT (signal wall carbon nanotube) and MWCNT (multi-wall carbon nanotube) with base liquid (water). Under the flow suppositions, a mathematical model was settled by means of boundary layer approximations in terms of partial differential equations. The suitable transformation was developed by using the lie symmetry method. Partial differential equations were transformed into ordinary differential equations by suitable transformations. The dimensionless system was elucidated through a numerical technique named bvp4c. The impacts of pertinent flow parameters on skin friction, Nusselt number, and temperature and velocity distributions were depicted through tabular form as well as graphical form. In this study, the Yamada Ota model achieved a higher heat transfer rate compared to the Tiwari Das and Xue hybrid nanofluid models. The skin friction (CfxRe-1/2) increased and temperature gradient (Nu(x)Re(-1/2)) declined due to the increment of solid nanoparticle concentration (phi(2)). Physically, skin friction increased because the higher values of the solid nanoparticles increased resistance to the fluid motion.

Automated summary

This study analyzed the stagnation point flow of unsteady compressible Casson hybrid nanofluid flow over a vertical stretching sheet and compared the Yamada Ota, Tiwari Das, and Xue hybrid nanofluid models. The effects of Lorentz force and nonlinear radiation were studied. The results showed that the Yamada Ota model had a higher heat transfer rate compared to the other models.