Advanced Immersed Boundary Cartesian Meshing Technology in FloEFD
For the numerical simulation of Navier-Stokes equations, the choice of the mesh type plays a significant role. Comparative calculations on different mesh types illustrates that the best simulation precision, characterized by minimum Local Truncation Error (LTE), is obtained on Cartesian meshes. For the boundary representation the Immersed Boundary (IB) approach, which does not require a boundary-conforming mesh, is used. Use of Cartesian meshes together with Immersed Boundary approach makes it possible to efficiently: minimize approximation errors; build operators with good spectral properties, so that robustness of method is guaranteed; speed up the process of grid generation; and make grid generation robust and flexible. Test cases given in this paper represent a small selection of Mentor Graphic’s validation examples that illustrate the IB approach precision and flexibility of FloEFD meshing technology in the wide range of industrial examples of geometry and physical formulations.
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