Abstract:Objective In view of the emergence of more and more artificial electromagnetic field environment, such as high-voltage transmission line, maglev train, nuclear magnetic resonance equipment and electromagnetic metallurgy equipment, the three-dimensional bifurcation carotid blood of human body is selected as the object. The three-dimensional vascular model is reconstructed through CT image to study the influence of external uniform magnetic field on hemodynamic behavior. Methods The mathematical model of blood flow with external uniform magnetic field is established by using the theory of computational fluid dynamics and the method of magnetohydrodynamics. The simulation is carried out by using the multi physical field coupling simulation software COMSOL Multiphysics to explore the effects of magnetic field intensity on blood flow velocity, pressure and shear stress. Results The results show that the magnetic field significantly suppresses the velocity at the center of the blood vessel with the increase of magnetic field intensity. The wall pressure decreases with the increase of magnetic field intensity, and the influence of magnetic field on wall pressure before blood flow bifurcation is obvious, but the influence on wall pressure after blood flow bifurcation is weak. After the blood flow enters the branch vessel, the wall shear stress increases significantly, and the effect of magnetic field on the shear stress also increases significantly. Conclusions Human blood has magnetohydrodynamic characteristics, and the magnetic field in a certain intensity range has a significant impact on blood flow. The research results provide a theoretical basis for the design of artificial equipment with high intensity magnetic field, evaluation of the effects of the artificial magnetic field on human hemodynamics, and diagnosis of the diseases caused by artificial magnetic field.