Atmospheric Modeling: Development of Vortex Structures in Buoyant and Shear Flows
Final rept. 1 Aug-31 Dec 1972
PHYSICAL DYNAMICS INC DETROIT MI
Pagination or Media Count:
Particle-in-cell PIC calculations representing a vortex by the particles were done by Rosenhead in 1930 in his study of vortex streets by Birkoff and Fisher in 1959, and by Hama and Burke in 1960. Abernathy and Kronauer made a detailed study of the Karman vortex street in 1962 using the same method. Hockney 1962 was the first one to incorporate the advantages of the fast Fourier transform FFT to the PIC method in order to handle very large numbers of particles. Chorin 1973 proposed a new version of the discrete vortex method where vortices are needed only to satisfy the no-slip boundary conditions. The numerical study presented herein combines the concepts of the PIC method, Greens function, and the FFT methods.
- Fluid Mechanics