The calculation of flows in three-dimensional complex geometries is presented. The computational domain is discretizied by using a system of overlapping grids. This grid system may also include locally refined subregions. This system of overlapping grids has been integrated into different solvers that have been design to treat compressible or incompressible flows. Higher order approximations have also been introduced. The grid system fits well into the multigrid scheme that has been used to solve the discrete problem. The numerical procedure has been applied to different time-varying geometries in two-dimensions. In three-dimensions, both swirling flows and direct simulation of shear layers were solved using higer order approximations and locally refined grids. The main advantages of the numerical scheme are its flexibility in describing complex geometries, allowing a relatively fast numerical solution with controllable accuracy, and the possibility of utilizing multiprocessor computer systems with a large local memory and a relatively fast interprocessor communication.
AIAA, Fluid Dynamics, 21st Plasma Dynamics and Lasers Conference, 21st, Seattle, WA, June 18-20, 1990. 17 p.
- Pub Date:
- June 1990
- Computational Fluid Dynamics;
- Computational Grids;
- Flow Geometry;
- Grid Generation (Mathematics);
- Three Dimensional Flow;
- Compressible Flow;
- Incompressible Flow;
- Shear Layers;
- Fluid Mechanics and Heat Transfer