An efficient non-iterative smoothed particle hydrodynamics fluid simulation method with variable smoothing length  

作　　者：Min Li Hongshu Li Weiliang Meng Jian Zhu Gary Zhang 

机构地区：[1]The School of Computer Science,Guangdong University of Technology,Guangzhou 510006,China [2]The School of Information Engineering,Guangdong University of Technology,Guangzhou 510006,China [3]The School of Advanced Manufacturing,Guangdong University of Technology,Guangzhou 510006,China [4]National Laboratory of Pattern Recognition,Institute of Automation of the Chinese Academy of Sciences,Beijing 100190,China.

出　　处：《Visual Computing for Industry,Biomedicine,and Art》2023年第1期1-13,共13页工医艺的可视计算（英文）

基　　金：the Key Program of National Natural Science Foundation of China,No.62237001;National Natural Science Foundation for Excellent Young Scholars,No.6212200101;National Natural Science Foundation for General Program,Nos.62176066 and 61976052;Guangdong Provincial Science and Technology Innovation Strategy Fund,No.2019B121203012;and Guangzhou Science and Technology Plan,No.202007040005.

摘　　要：In classical smoothed particle hydrodynamics(SPH)fluid simulation approaches,the smoothing length of Lagrangian particles is typically constant.One major disadvantage is the lack of adaptiveness,which may compromise accuracy in fluid regions such as splashes and surfaces.Attempts to address this problem used variable smoothing lengths.Yet the existing methods are computationally complex and non-efficient,because the smoothing length is typically calculated using iterative optimization.Here,we propose an efficient non-iterative SPH fluid simulation method with variable smoothing length(VSLSPH).VSLSPH correlates the smoothing length to the density change,and adaptively adjusts the smoothing length of particles with high accuracy and low computational cost,enabling large time steps.Our experimental results demonstrate the advantages of the VSLSPH approach in terms of its simulation accuracy and efficiency.

关 键 词：Smoothed particle hydrodynamics Variable smooth length Fluid simulation 

分 类 号：O35[理学—流体力学] TP39[理学—力学]