In this paper, we describe a composite grid method for viscous flow computations. The grid system consists of structured grids for a finite-different method (FDM) and unstructured grids for a finite-element method (FEM). FDM grids are used for the viscous flow regions near bodies, and FEM grids are applied to the remaining regions. With this method, both computational efficiency of the FDM and geometrical flexibility of the FEM can be obtained. The most important advantage of this composite grid method is its grid flexibility. In order to strengthen this advantage, we describe a practical grid generation procedure for the finite-element method in particular to use for the FDM-FEM composite grid method. The capability of the method is demonstrated by computing the Navier-Stokes equations for a double airfoil flowfield in two dimensions, and wing/nacelle simulator flowfield for three-dimensions.
|Number of pages||10|
|Publication status||Published - 1987|
|Event||8th Computational Fluid Dynamics Conference, 1987 - Honolulu, United States|
Duration: 1987 Jun 9 → 1987 Jun 11
|Conference||8th Computational Fluid Dynamics Conference, 1987|
|Period||87/6/9 → 87/6/11|