Effect of magnetic fields on viscous liquid column with finite length in a vertical straight tube

The formation of thrombus is closely related to the hydrodynamical conditions. Chandler’s experiment and further research shows that the cause thrombus formed in the lower meniscus may be that the fluid particles at relatively high speed strike on the lower meniscus leading to the gathering of platelet and red blood cells (RBC). This paper deals with the motion of viscous liquid column with finite length and two free surfaces in a vertical straight tube under the action of magnetic fields, numerical solution is obtained by the time-dependent method in a finite difference techniques. The results show that under the action of a proper magnetic field, the axial velocity at the lower meniscus near the axis will decrease, strike on the lower meniscus will be reduced and then thrombus formation at the lower meniscus can be avoided. This result provides a guide to further experimental research on the mechanism of thrombus formation and medical treatment to thrombus.