FSI within Aortic Arch Model over Cardiac Cycle and Influence of Wall Stiffness on Wall Stress in Layered Wall

The aorta is the largest artery that delivers blood from the heart to the rest of the body, and many cardiovascular diseases often occur on the aortic arch. The complex mechanical interaction between pulsatile blood flow and wall dynamics in the aortic arch model was simulated by means of computational loose coupling fluid-structure interaction analyses. This study investigates the pulsatile flow field in the aortic arch, shows the wall displacement and aorta deformation over cardiac cycle, determines wall stresses, evaluated the influence of wall stiffness, and provides physical insight into the biomechanics of aortic dissection. The numerical layered aortic model may prove useful for studying biomechanical analysis and the pathogeneses of aortic dissection.