2 MODIFIED VERSIONS OF HSU-LEE ELLIPTIC SOLVER OF GRID GENERATION

Two modifications of the Hsu and Lee elliptic grid generation method (which is, in turn, a modified Sorenson method) are developed. The first modification specifies the control functions along all of the boundaries in terms of grid distribution, grid size, and angle of intersection. The interior control functions are interpolated by transfinite interpolation. The second modification successfully employs one of the control functions in order to specify the grid size distribution line by line between two opposite boundaries, the other control function being retained for orthogonality control By linking the arc length specification with the weighting function of Dwyer et al., the second method is extended to become an adaptive grid scheme.