Effect of magnetic field on blood flow and heat transfer through a stenosed artery

Abstract

Blood flow and heat transfer through a stenosed artery under the influence of a steady spatially varying magnetic field is studied. Blood is considered as non-Newtonian fluid and the model concerns the varying viscosity and electrical conductivity. The numerical solution is obtained by solving the governing equations using a finite volume method on structured grid. The pressure-velocity coupling is solved using the SIMPLEC technique. Results indicate that the magnetic field modifies the flow and temperature fields considerably. The symmetry of the flow downstream of the stenosis is broken and the vortex close to the magnetic field source is enlarged by two times. The temperature downstream of the stenosis is cooler in the most region of application of the magnetic field than the corresponding temperature in the pure hydrodynamic case, and the maximum decrement is 0.36K. In contrast, the temperature in the area close to the opposite wall and downstream of the stenosis is increased, and the maximum increment is 0.9K.