Effect of vortex generator on a wavy wall heat exchanger performance for turbulent nanofluid flow under a magnetic field

Use of a magnetic field, wavy wall heat exchanger and dispersion of nanoscale particles are the new methods for improving the thermal systems performance. Flow vortex, which is formed by means of chips, or appendages such as blades or fins, is very effective in improving the heat transfer rate. In this study, the effect of magnetic field and vortex generator in compulsory displacement is investigated separately and simultaneously. In the present work, a wavy wall heat exchanger is simulated in various geometries of the Vertex generator under magnetic fields in various Hartmann and Reynolds numbers filled with nanofluid. For this propose fluid flow and heat transfer were simulated using Navier Stokes, conservatism of mass, momentum and energy with incompressible flow assumption. The system of nonlinear governing equations is solved explicitly using a fluent software based on the basic pressure solver and finite volume method. Turbulent equations are discriminated using the first order upstream method, as well as momentum, continuity and energy equations with upstream second order method. The results show that with increasing Reynolds number, the Nusselt number and friction coefficient increase and decrease respectively. As the Hartman number increases, the Nusselt number increases and the friction coefficient decreases.