SIMULATION OF 2D EXTERNAL VISCOUS FLOWS BY MEANS OF A DOMAIN DECOMPOSITION METHOD USING AN INFLUENCE MATRIX TECHNIQUE

Two-dimensional external viscous flows are numerically approximated by means of a domain decomposition method which combines a vortex method and a finite difference method. The vortex method is used in the flow region which is dominated by convective effects, whereas the finite d ifference method is used in the flow region where viscous diffusion ef fects are dominant. An influence matrix technique combined with the un iformity condition of the pressure is used to enforce the tangential v elocity boundary condition. Comparisons between numerical and experime ntal data show that the method is well adapted for simulating two-dime nsional flows.