Numerical Analysis of Heat and Mass Transfer of Magnetic Nanoparticles in a Non-Newtonian Blood Flow, under Influence of Magnetic Field

The purpose of this study is to numerically investigate the heat and mass transfer of magnetic nanoparticles inside a 3D capillary with non-Newtonian blood flow, Under the influence of external non-uniform magnetic field. For this purpose, the governing equations including continuity, momentum, energy, Maxwell, and concentration were coupled and solved by COMSOL, a finite element based software. Blood is assumed as non-Newtonian fluid with Carreau viscosity model and the vessel wall is assumed to be rigid. the results indicate that the concentration of magnetic nanoparticles in the upper wall of the vessel at long times reaches a constant value. This accumulation affects the blood flow temperature. Magnetic field strength, magnetic susceptibility, and concentration of nanoparticles are directly related to the temperature of the bloodstream at the location of particles accumulation. By increasing the size of nanoparticles and inlet velocity, the blood flow temperature decreases so that in sizes above 70 nm, the thermal effect of particles becomes very low. Also, the non-Newtonian blood assumption has significant effect on the results.