摘要
采用Thurey提出的单相格子Boltzmann方法模拟了带自由面流体的运动。它在标准的单相模型的基础上将每个格子标记为气体、液体或自由面。格子的类型通过计算格子间的质量通量来重新初始化。与多相模型相比,它不需要求解气相格子的运动,提高了计算效率。针对此方法,给出了一种来流和出流边界条件的提法。最后,计算了来流被竖直圆柱阻挡,破碎成两股后又接合起来运动的动态过程。结果表明,此方法能描述来流经圆柱后高度降低,并形成涡等现象。
The single-phase lattice Boltzmann method proposed by Thurey was used to solve free-surface flow problems. Based on the standard single-phase model, the method tags each cell with a corresponding type, e.g. gas, fluid or interface. The type is re-initialized by calculating the mass fluxes between neighboring ceils. In contrast to the multi-phase models, simulating the gas phase motion is not needed, so the computation efficiency is improved. Inflow and outflow boundary conditions for the method were given to simulate the dynamical process of flow obstructed by a 3-D cylinder, i, e. the flow was broken into two parts and these two parts then merge again. Tests indicate that the method can reasonably describe and explain some phenomena, such as the reduced height and the vortex formation behind the cylinder.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第11期2017-2020,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金资助项目(10302013
10572022)
作者简介
汤波（1982-），男（汉），安徽，博士研究生。
通讯联系人：王天舒，副教授，E-mail：tswang@tsinghua．edu．cn
