The application of a three-dimensional vortex-in-cell approach to simulate the heads-on collision of two vortex rings
學年 112
學期 2
發表日期 2024-07-29
作品名稱 The application of a three-dimensional vortex-in-cell approach to simulate the heads-on collision of two vortex rings
作品名稱（其他語言）
著者 Chieh-Hsun Wu
作品所屬單位
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會議名稱 Bulff Body Aerodynamics and Applications IX (BBAAIX)
會議地點 University of Birmingham, United Kingdom
摘要 This paper presents the application of the vortex-in-cell method in the simulation of the heads-on collision of two co-axial vortex rings. The results capture the fascinating phenomenon presented in the dyed flow visualization in the literature that the two colliding rings eventually evolve into small rings emitting out radially. Through this numerical work, the VIC code developed is validated, and the underlying mechanism is described. The generation of small rings is found to be caused by the reconnection processes twice that were initiated by the initial perturbation of the vortex rings. Such a process involves a series of vortex stretching, accelerating the reduction of vorticity scales. The vorticity diffusion then catches on and dominates for later times.
關鍵字 CFD, vortex-in-cell method, vortex ring, head-on collision
語言 zh_TW
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會議性質 國際
校內研討會地點 無
研討會時間 20240729~20240802
通訊作者
國別 TWN
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