Fluid-Solid Coupling Analysis And Simulation Of Abnormal Artery Vascular And Y-Bifurcation Blood Vessels

Biomechanics is an interdisciplinary discipline that spans many disciplines such as fluid mechanics,biology,and medicine.People's research on the basic principles of biomechanics is to better understand some phenomena in life sciences.The relationship between the functions and structures of living systems is quantitatively analyzed using mechanics methods,and the movement laws of life phenomena are further discussed.In biomechanics research,people use numerical calculation or numerical simulation has become one of the most important research methods.Based on fluid mechanics and solid mechanics theory,this paper applied fluid continuity equations and equations of motion,applies fluid boundary conditions,fluid-structure interaction boundary conditions and material parameters,and performs fluid-solid coupling analysis using COMSOL Multiphysics software.The research content mainly includes the following aspects:(1)We performed fluid-solid coupling analysis of the linear elastic and hyperelastic constitutive models of different axial length hemangiomas,and analyzed the blood velocity field,pressure field,and wall shear stress of different size hemangiomas.At the same time,we analyzed the effects of different constitutive models on blood flow and wall shear stress in the vascular wall of the same size hemangiomas.(2)Based on the linear elastic and hyperelastic constitutive models,we performed fluid-solid coupling analysis of multiple stenosis and different degrees of local narrow vascular wall.We analyzed the blood flow inside the blood vessel and the wall shear stress of the blood vessel wall under multiple stenosis and different degrees of local stenosis.At the same time,we analyzed the blood flow and wall shear stress in the vessel wall with different constitutive models.(3)We performed a fluid-solid coupling analysis of the Y-branched arterial vessel wall model using a linear elastic and hyperelastic constitutive model.We analyzed the internal blood velocity field,pressure field,and shear stress of a Y-bifurcation based on different flow-distribution ratios.We also analyzed the intravascular blood flow and wall shear stress of different constitutive models under the same flow distribution ratio.This article simulates the blood velocity field,pressure field,and wall shear stress distribution of arterial blood vessels from multiple models and perspectives,providing a theoretical basis for clinical diagnosis and medical research.