lattice boltzmann simulation of blood flow properties and vessel geometry in open and closed vessels: a numerical study

In the present article, lattice boltzmann method is utilized to simulate two-dimensional incompressible viscous flow in open and closed microchannels (vessels). the main focus of the present research is to study the physical parameters of blood fiow in vessels. the presented computational results are reasonably in agreement with the available data in the literature. in addition, the accuracy of poiseuille law is investigated for blood flow in the open vessel, too. for this purpose, the effect of the vessel diameter and blood viscosity on blood flow is studied numerically. the obtained results showed that pressure tended to increase the flow, while resistance tends to decrease it. based on additional results, the effect of blood injection into coronary bifurcation with two closed ends is studied. the blood pressure drop is high at the beginning of the vessel (pressure variation is high between the adjacent points along the vessel); however, after the path along the vessel, the speed of dropping pressure decreases and the pressure difference between the adjoining points decreases along the vessel. finally, the present results have been compared with the available numerical results that show good agreement.