重力场下通道内毛细上升过程的格子Boltzmann模拟

采用格子Boltzmann方法中Shan-Chen伪势模型对重力场下通道中液体毛细上升过程进行了数值模拟,得到其流场分布,分析了通道个数、通道宽度与通道放置角度对通道内液柱上升过程的影响。数值结果表明,不同个数的通道毛细抽吸的最终高度差异不大,但通道个数对每个通道内液体毛细上升过程有一定影响。在重力场下,通道内液体沿通道方向的毛细上升长度随着通道倾斜角度的增大而增大,液柱稳定的竖直高度先增大后减小。

Simulation of capillary rise process in channel under gravity by Lattice Boltzmann Method

Shan-Chen pseudo-potential model in Lattice Boltzmann method was applied to numerically simulate the process of capillary rise in the channels under gravity. The flow field of the liquid in the channels was obtained and the influence on the process of capillary rise was investigated by changing the number, width and inclination angle of the channel. Numerical results indicate that the number of channels impacts little on the final capillary rise height, but influences the capillary rise process in different channels. Capillary rise length along the channel increases as the channel inclination angle increases in the gravity field while the vertical stable height increases at first then decreases.