摘要
通过引入SPH(smoothed particle hydrodynamics)方法中的样条函数作为核子函数,并进一步修正扩散模型及梯度模型的计算公式,对已有MPS(moving particle semi-implicit)水流数学模型进行了改进．将该模型应用于垂向二维水柱倒塌过程计算,结合直立挡板的冲击压力过程实测结果,探讨了水流黏滞系数和摩阻项对直立挡板压力过程计算结果的影响,发现黏滞系数影响峰型的尖锐度,摩阻项影响压力过程的相位；通过适当选取黏滞系数和摩阻系数,获得了与实测结果一致的压力数值计算结果。
Moving particle semi-implicit （MPS） flow model is improved by introduction of the spline function used in the smoothed particle hydrodynamics （SPH） model as the kernel function and some modifications for the diffusion and gradient submodels. The improved model is applied to the simulation of the collapsing process of vertical 2D water columns. Simulation results of the pressure process on the right vertical board are discussed after comparing with the measured ones. It is found that the viscosity coefficient affects the sharpness of the pressure peak and the friction term affects the phase of the pressure process. Good agreement between simulated and measured results of the pressure process can be achieved by adjusting the values of the viscosity coefficient and the friction term.
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2006年第9期1031-1036,共6页
Journal of Tianjin University(Science and Technology)
基金
国家自然科学基金(50479047).
关键词
MPS方法
水柱倒塌
核子函数
冲击压力
黏滞系数
摩阻项
MPS method
collapse of water column
kernel function
impact pressure
viscosity coefficient
friction term
