A new overset grid algorithm applied to the simulation of flows involving complex geometries.

The generation of structured grids around complex geometries is generally a difficult task. This task is typically a major bottleneck in the overall solution procedure; however, the overset grid method can be used to relieve much of this burden. An overset grid consists of a set of simple component grids, which can overlap arbitrarily (provided there is sufficient overlap to interpolate from). The union of all simple grids should then delineate the global domain. This allows complex domains to meshed using a series of simple meshes.A new overset hole cutting algorithm is developed in order to automatically combine the series of simple meshes into an overset domain. It has been shown that for a variety of test cases, continuous and accurate solutions are obtained from one grid to another, which are comparable to experimental data.