A numerical method for simulating the interaction between fluid flow and moving or deformable structures

摘要

The invention relates to computer software systems for simulating physical processes, i.e. the interaction of fluid flow and moving or deformable structures. Methods to simulate fluid flow processes belong to the technical field of Computational Fluid Dynamics. The proposed invention applies to fluid/structure interaction problems that are encountered in biological flows, such as the blood flow in the human circulatory system, air flow in the lungs and blood flow in medical implants and artificial organs. The invention method is based on a non-boundary-conforming strategy to enforce the appropriate boundary conditions on moving or deformable solid surfaces. The invention method is characterized by a field-extension procedure for the time advancement of the equations and by the reconstruction/extension of the solution on the well-defined normal, which is shown with broken line where h1 = h2, to the boundary, which is shown with bold unbroken line, resulting in a robust method that does not require special treatments. <IMAGE>