Le jeudi 27 janvier 2011 à 17h30 - Salle 331Bruno Tayllamin
New Immersed Boundary methods for a staggered grid are developed and compared with a reference Body-Fitted method in the context of biomedical blood flow simulations. The Immersed Boundary methods developed consist in reconstructing the velocity value close to the wall using different interpolation procedures while keeping a homogeneous Neumann boundary condition for pressure. The methods are devised to be robust enough in order to cope with complex geometry arising in the biomedical context. The capability of the Immersed Boundary methods to achieve mass conservation is assessed when considering the case of the flow through a stenotic vessel. To demonstrate the potential of these Immersed Boundary methods to cope with more physilogical flow, simulation of a pulsatile flow through an aortic cross was performed. In both flow cases, the flow solution obtained using the Immersed Boundary methods is compared with that obtained using a Body-Fitted method.