AN IMMERSED BOUNDARY HEART MODEL COUPLED WITH A MULTICOMPARTMENT LUMPED MODEL OF THE CIRCULATORY SYSTEM

초록

A new computational model of the circulatory system is developed to investigate the intracardiac blood flow patterns and the motion of the mitral valve. In this work, we couple an existing two-dimensional model for the left heart with a multicompartment lumped model for the whole circulation to analyze the hemodynamics of the normal circulation in humans. The two-dimensional left-heart model is based on the immersed boundary method, and the lumped circulation model is governed by a system of ordinary differential equations. We investigate the intraventricular velocity field and the velocity curves over the mitral ring, between the valve leaflets, and across the aortic outflow tract. The flow and pressure curves are also measured in the left and right hearts and the systemic and pulmonary arteries. Our simulation results are in reasonably good agreement with ones in the literature and comparable to the existing magnetic resonance data, despite the inherent deficiency of a two-dimensional modeling of the left heart.

키워드