基于LBM方法的圆盘等速入水空泡的数值模拟

采用单相格子Boltzmann模型进行了物体垂直入水问题的研究.该模型适用于大密度比的气液两相流动,其特点是忽略了系统中气相对液相的动力学影响.模拟了圆盘垂直等速入水过程,给出了入水过程中空泡与自由面的变化规律,研究了圆盘入水空泡相对闭合深度与Froude数之间的关系.数值模拟结果与相关的实验结果吻合良好,验证了格子Boltzmann方法(LBM:Lattice Boltzmann Method)模拟物体入水问题的可行性.

Numerical simulation of constant speed water-entry cavity based on LBM

A single phase free surface lattice Boltzmann model is implemented to the simulation of the process of body entering water vertically.The single-phase model,which is characterized by neglecting the in-fluence of the gas phase to the liquid phase in the system,is applied as it is mostly valid for the gas-liquid two-phase flow with high density ratio.A three dimensional disk entering water vertically at constant speed is simulated.The process of the interaction of cavity with free surface and the relationship...