Abstract
The unstructured collocated grid can be easily adapted to the complicated boundary shapes. Thus, it is effective when the incompressible flow is predicted for the numerical actual phenomena. A C-ISMAC method is an implicit algorithm, which had been shown to be effective on the structured collocated grid. This method is based on an implicit-SMAC method in the stagged grid, and can be used with higher-order schemes for spatial discretization as done in an explicit scheme. In this paper this method is applied to unstructured collocated grid. To show the validity, the incompressible flows in the square and triangullar cavitys is calculated with a C-ISMAC method. It is shown that the calculation time is decreased and the calculation accuracy is almost same when a C-ISMAC method is used.
