Unsteady MHD slip flow of a ferrofluid over an impulsively stretched vertical surface

S M M El-Kabeir,M Modather,R S R Gorla,A M Rashad,E R El-Zahar

doi:10.1063/1.5088610

Abstract

Investigation of unsteady magnetohydrodynamic (MHD) mixed convective ferrofluid flow over an impulsively stretchable surface is modeled with convective boundary conditions and partial slip impacts. Employing a finite-difference method, the governing non-similar equations are solved computationally. The sway of different considerable parameters on flow and heat transfer are demonstrated in graphical forms and discussed. The results show that the increment in the volume fraction leads to decrease the velocity and the temperature as well as the skin-friction coefficient and Nusselt number. Moreover, in the assisting flow case both the velocity and skin friction coefficient increase as Biot number increases, while they have the opposite behaviour in the opposing flow case. Also, both the temperature and local Nusselt number increase as Biot number increases for assisting and opposing flows.

Highlights

Nowadays, magnetohydrodynamics (MHD) flow has a wide area of use from the defense industry to the automotive industry, from the field of medicine to basic sciences such as chemistry and biology
Investigation of unsteady magnetohydrodynamic (MHD) mixed convective ferrofluid flow over an impulsively stretchable surface is modeled with convective boundary conditions and partial slip impacts
The results show that the increment in the volume fraction leads to decrease the velocity and the temperature as well as the skin-friction coefficient and Nusselt number

Summary

Introduction

Magnetohydrodynamics (MHD) flow has a wide area of use from the defense industry to the automotive industry, from the field of medicine to basic sciences such as chemistry and biology. MHD flow and heat transfer from fluids along stretchable surfaces have various engineering applications in many industries like metallurgical operations including the refrigerating of continued strips and threads dragged through a serene fluid and refinement of molten metals from non-metallic implications. 3–13, attempted to investigate the MHD flow and heat transfer concerning the stretchable surfaces under various boundary conditions. Cooling competences of heat transportation mechanisms are often constrained owing to lower conductivity of standard heat transporting liquids. No doubt metals comprise higher conductivities than liquids. The liquid conductivities comprising suspended metallic elements could be anticipated to be considerably higher in comparison to standard heat transporting liquids.. The adjourned nanoparticles rise conductivity and heat transportation effectiveness of base liquids

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Discussion

Conclusion