Computation of Unsteady Separated Flow Using the Vortex Particle Method (I) - Boundary Element Method and Vortex Strength Around the Square Cylinder -

와류입자법에 의한 비정상 박리흐름의 전산(I) -경계요소법과 정방형 실린더 주위의 와류강도-

The vortex particle method, which includes viscous effects, consists of diffusion of boundary vorticity and creation of the vortex particles, convection, particle strength exchange, and particle redistribution. Accuracy of the boundary element method is very important since it creates the particles around the body at every time step. A boundary element method based on source panel was investigated as part of computation of unsteady separated flows by rising the vortex particle method. The potential flows were computed around a circular cylinder and a square cylinder. The results around the circular cylinder were compared with the exact solution, and the distribution of vorticity, in particular near the sharp comers of the square cylinder, is scrutinized for different number of panels.