Finite Element Analysis And Numerical Simulation Of Local Y-bifurcation Blood Model In Two Dimensions

Biofluid mechanics is an interdisciplinary and interpenetrative subject amongfluid mechanics, biology, medicine and also other subjects. According to classicalmechanics and fluid mechanics, it analyzes some phenomena of the life sciences.With the help of the theory of mechanics, it also analyzes the relationship between thefunction and structure of the living system quantitatively in order to discuss themotional law of life. In terms of researshes on biological fluid mechanics, we oftenchoose the numerical computation or numerical simulation as our research methods.This paper mainly adopts the arbitrary Lagrange-the euler method (ALE) onaccount of flow condition of the bifurcation artery. It simulates the flow condition oftwo dimensional38and52degrees of elastic bifurcation of blood vessels and makes anumerical simulation on38degrees and52degrees rigid bifurcate using the finiteelement method. Given the same boundary conditions and the initial boundary valueconditions, it simulates the flow velocity of blood and changes on pressure of the38degrees and52degrees elastic and rigid bifurcation blood vessels, and makes acomparision between them. The results show that: compared with the velocity andpressure of the elastic bifurcation blood vessels, the rigid bifurcation blood vessels arenot so stable. And low pressure and low speed area formed at the branches are biggerin the rigid bifurcation blood vessels. Also, comparing38degrees with52degreesbifurcation blood vessels, we find that the greater in the angle of bifurcation, thewider of low speed area of low gas pressure area, and the farther away from thebranches, the greater probability of getting thrombus. In normal circumstances, thefastest flow velocity of blood is found at the center of the arteries of the body, thecloser to the vessel wall, the slower in velocity, the greater probability of gettingthrombus at the branches point. Therefore, we can not only easily understand themechanism of thrombus, but also be able to fully explain that it is feasible to carry outthe numerical research on blood flow through the method of ALE.