WATER ENTRY OF A WEDGE BASED ON SPH MODEL WITH AN IMPROVED BOUNDARY TREATMENT

作     者：GONG Kai LIU Hua WANG Ben-long GONG Kai Department of Engineering Mechanics, Shanghai Jiao Tong University, Shanghai 200240, China,LIU Hua Department of Engineering Mechanics, Shanghai Jiao Tong University, Shanghai 200240, China State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China WANG Ben-long Department of Engineering Mechanics, Shanghai Jiao Tong University, Shanghai 200240, China

作者机构：Department of Engineering Mechanics Shanghai Jiao Tong University Shanghai 200240 China State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University Shanghai 200240 China 

出 版 物：《Journal of Hydrodynamics》 (水动力学研究与进展B辑（英文版）)

年 卷 期：2009年第21卷第6期

页      面：750-757页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 080203[工学-机械设计及理论] 0807[工学-动力工程及工程热物理] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China (Grant No.10802049) the Shanghai Leading Academic Discipline Project (Grant No.B206) the Research Found of State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University (Grant No.GKZD010806) 

主　　题：water entry Smoothed Particle Hydrodynamics (SPH) non-reflection boundary 

摘      要：The hydrodynamic problem of a two-dimensional wedge entering water is studied based on Smoothed Particle Hydrodynamics （SPH） model. A non-reflection boundary treatment for SPH method is proposed to reduce the reflection of sound waves. The boundary pressure is obtained using an improved coupling boundary treatment approach, which is validated by comparing the simulation results with experimental and analytical results in literature. A series of cases with different initial entering velocities are simulated. The maximum force on the wedge and the corresponding time required to reach it for the different cases of initial entering velocities of the wedge are obained and fitted into formulas against the initial entering velocity of the wedge. The maximum drag coefficients of the wedge for the different cases with Froude number greater than 2 are all near the value of 0.91.