Numerical Simulation Of Pulse Wave In Arterial Vessels

Arterial disease is one of the serious diseases that threaten human life and health.It is important and urgent to enhance people's awareness of arterial disease and the degree of concern for their own health.In recent years,it is an important issue about early diagnosis and early treatment of arterial disease on hemodynamic research.The waveform of arterial pulse wave is closely related to arterial disease.It is a very important task to simulate the pulsation of blood flow in the human arterial system because it helps us to better understand the human arterial system and thus prevent and cure arterial disease.In this thesis,firstly,a commercial software Solidworks has beenused to establish an ideal straight pipe model.And the fluid-solid coupling of rigid and elastic tubes is calculated by commercial software ANSYS CFX.The formation process of arterial pulse wave is simulated and compared with the classical graph.The simulated waveform has high similarity with the classical graph.Secondly,the bifurcated blood vessels of three different Young's modulus has been simulated,the phenomenon that reflected waves will produce when pulse waves encountered bifurcation in the process of transmission has been successfully reproduced.The stress at the arterial bifurcation is more concentrated,prone to vascular rupture,resulting in aneurysm and other diseases.Thirdly,the simplified H-type blood vessels has been simulated and analyzed.The pulse waves obtained by simulation was very similarwith that measured by BPro.It was found that there was a great correlation between the pressure wave of the ulnar artery and the radial wave pulse waveform.Finally,simulation and experimental research have been carried out on the radial arteries in the wrist.Theresults showed that the low frequency components in the radial artery were most likely due to the vibration of the arteries themselves and the interaction between them.