基于空间变光滑长度SPH方法研究

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Abstract In order to improve the computational efficiency and spatial resolution of traditional SPH method, diffused particle distribution models were adopted. Each particle was assigned with an independent smoothing length and mass, and the SPH method with space-based variable smoothing length was proposed to solve problems. The effectiveness of the method was verified by simulating an air bubble rising case and an asymmetric wedge body water entry impact one. The results showed that both cases’ computation results with the proposed method agree well with the experimental ones with a reasonable particle distribution model; the particle numbers of both cases decreases by about 1/4 compared with those using the uniform particle distribution model, and their computation efficiencies increase by 25%; the SPH method with space-based variable smoothing length can be used not only to keep the computational accuracy but also significantly improve the computational efficiency, it is suitable for simulating complex engineering problems, such as, 3D multi-phase flow and water entry impact.

Key words： space-based variable smoothing length computational efficiency particle distribution model water-entry impact SPH

Received: 10 July 2017 Published: 28 February 2019

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	Articles by authors
	SHI Wenkui
	SHEN Yanming
	CHEN Jianqiang

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SHI Wenkui,SHEN Yanming,CHEN Jianqiang. SPH method with space-based variable smoothing length[J]. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(5): 259-264.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2019/V38/I5/259

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