AUTOMATED LOCAL REBUILDING OF NON-REGULAR QUADRANGULAR GRIDS WHEN CALCULATING PROBLEMS WITH SEVERE DEFORMATIONS
A. V. Skovpen’, V. A. Bychenkov, I. I. Kuznetsova
VANT. Ser.: Mat. Mod. Fiz. Proc 2007. Вып.1. С. 38-45.
At 2D simulation of flows with severe shear deformations on non- stationary grids the cells may deteriorate and become intolerable for further calculations. As a possible solution of this problem local automatic gridrebuilding and re-interpolation of physical quantities in the cells and the nodes of the reconstructed sub-domain can be considered. First, the grid is smoothed in the local sub-domains selected for reconstruction. If it does not help improve the grid quality to the required state, a new grid is built in this sub-domain. For this purpose the QMV frontal algorithm of non-regular quadrangular grid building is used. The algorithm works in the automatic mode and does not modify boundary nodes. An example of the calculation where the local automatic grid rebuilding is used is given in the paper. The calculation is performed under the SPRUT code (RFNC-VNIITF). The performed calculation series confirms that using the local grid rebuilding allows automatic support of the integrity and the geometry of the used computational grid. This significantly expands the scope of simulation problems and reduces the time needed for calculation of complex systems with severe deformations.
|
English
