Numerical simulation of MHD hybrid nanofluid flow by a stretchable surface

Abstract

• Flow of hybrid nanofluid, C u , A l 2 O 3 with two base fluids H 2 O a n d C 2 H 6 O 2 is examined • Flow considered through stretching surface • Finite difference scheme is used to solve the system of PDE's • The effect of magnetic field and thermal radiation are examined. Viscous fluid; Finite difference scheme; Magnetic field; Joule heatingThis article investigates the flow of hybrid nanofluid containing nano particles, Copper ( C u ) -Alumina Oxide ( A l 2 O 3 ) with two base fluids Water ( H 2 O ) and Ethylene glycol ( C 2 H 6 O 2 ) over a stretching surface. Magnetic field of constant strength is applied. Effects of Joule heating and viscous dissipation are contributed into energy equation. System of partial differential equation (PDE's) governs the continuity, momentum, and energy equations. Using suitable dimensionless parameters, the system of PDE's is transformed into dimensionless form. Numerical computations made employing finite difference method (FDM). This method converts the nonlinear PDE's to simple algebraic equations and by using variational technique the approximate solution is obtained technique. Impacts of important flow variables on velocity, skin friction and Nusselt number are shown graphically. The velocity decreases for higher Hartmann number and opposite behavior holds for Reynolds number. Temperature decays for Hartmann number while it enhances for Prandtl ( P r ) , Eckert ( E c ) and Reynold numbers. Comparison of both hybrid nanofluids are displayed graphically. It is concluded that C u − A l 2 O 3 / C 2 H 6 O 2 have more thermal conductivity than C u − A l 2 O 3 / H 2 O .