High-order overset method for blade vortex interaction

An alternative method for establishing grid connectivity in moving overset grids for unsteady flow is outlined and differences with existing methods noted. Notable among them is 'implicit' hole cutting. This is combined with high order monotone interpolations of both solutions and coordinates between grids. It is then applied to the problem of 2D BVI with shock. Differences in post interaction vortex profile with results from linear interpolation are also noted. (usually about 2:1 ratio) as they move through regions of different resolutions. A ratio of about 2.53.5:1 has been used here. The fact that BVI problems require multiple moving and static grids passing through each other during interactions signifies the importance of connectivity requirements among them. This paper also outlines an alternative method of connectivity which originates from such considerations. The next two sections describe an existing and an alternative method of grid connectivity before moving on to high-order interpolation and some 2D results.