平成26年度第8回講演会(日本航空宇宙学会関西支部分科会)
日時: | 平成26年10月20日(月) 14:30-15:30 |
場所: | 京都大学 桂キャンパスCクラスタ総合研究棟III(C3棟) 3階 b3n03室(航空宇宙工学専攻会議室) |
講演: | Lagrangian Particle Simulations of Fluid Vortices |
Prof. Robert Krasny (Department of Mathematics, University of Michigan, USA) |
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要旨: | We review some recent Lagrangian particle simulations of fluid vortices. Two examples are discussed, (1) vortex ring instability in 3D flow, and (2) vortex dynamics on a rotating sphere. These simulations use the Biot-Savart integral to recover the velocity from the vorticity, adaptive particle discretizations, and a tree code to reduce the CPU time from $O(N^2)$ to $O(N\log N)$, where $N$ is the number of particles. |