Insight on the dynamics of hydromagnetic stagnation‐point flow of magnetite‐water nanofluid due to a rotating stretchable disk: A two‐phase modified Buongiorno modeling and simulation

Abstract

AbstractThe hydromagnetic stagnation‐point flow of magnetite‐water nanofluid due to a rotating stretchable disk has been numerically accessed. The nanofluid flow has been modeled by employing the two‐phase modified Buongiorno model that incorporates the volume fraction dependent effective nanofluid properties, Brownian motion, and thermophoresis effects. Von Kármán's similarity transformations are utilized in transmuting the mathematically modeled equations into a system of first‐order ODEs which are then resolved numerically using the bvp4c numerical scheme. The consequence of influential parameters on the flow profiles and the physical quantities has been presented through graphs and tables. Engineering quantities like moment coefficient and pumping efficiency of the disk are also elucidated in this research work. Results show that an augmentation in the Hartmann number descends the velocity profiles and ascends the nanofluid temperature profile. Further, a drop in the drag coefficient and a rise in the heat transfer rate are noted with an increment in the velocity ratio parameter. The tidings of this numerical simulation have applications in spin coating, rotating heat exchangers, and rotating disk reactors.