Numerical simulation of 3-D free surface flows by overlapping MPS  

作　　者：唐振远 张友林 万德成 

机构地区：[1]State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China [2]Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai 200240, China

出　　处：《Journal of Hydrodynamics》2016年第2期306-312,共7页水动力学研究与进展B辑（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51379125,51490675,11432009 and 51579145)

摘　　要：An overlapping moving particle semi-implicit （MPS） method is applied for 3-D free surface flows based on our in-house particle solver MLParticle-SJTU. In this method, the coarse particles are distributed in the whole domain and the fine particles are distributed in the local region of interest at the same time. With the fine particles being generated and removed dynamically, an algorithm of generating particles based on the 3-D overlapping volume is developed. Then, a 3-D dam break flow with an obstacle is simulated to validate the overlapping MPS. The qualitative comparison among experimental data and the results obtained by the VOF and the MPS shows that the shape of the free surface obtained by the overlapping MPS is more accurate than that obtained by the UNI-coarse and close to that obtained by the UNI-fine in the overlapping domain. In addition, the water height and the impact pressure at Pi are also in an overall agreement with experimental data. Finally, the CPU time required by the overlapping MPS is about half of that required by the UNl-fine.An overlapping moving particle semi-implicit （MPS） method is applied for 3-D free surface flows based on our in-house particle solver MLParticle-SJTU. In this method, the coarse particles are distributed in the whole domain and the fine particles are distributed in the local region of interest at the same time. With the fine particles being generated and removed dynamically, an algorithm of generating particles based on the 3-D overlapping volume is developed. Then, a 3-D dam break flow with an obstacle is simulated to validate the overlapping MPS. The qualitative comparison among experimental data and the results obtained by the VOF and the MPS shows that the shape of the free surface obtained by the overlapping MPS is more accurate than that obtained by the UNI-coarse and close to that obtained by the UNI-fine in the overlapping domain. In addition, the water height and the impact pressure at Pi are also in an overall agreement with experimental data. Finally, the CPU time required by the overlapping MPS is about half of that required by the UNl-fine.

关 键 词：overlapping particle moving particle semi-implicit （MPS） generating particles free surface flow dam breaking 

分 类 号：O35[理学—流体力学]