Traditionally, the simulation of seepage flow is to seek for the solution of Laplace equation to the permeation head. In order to make use of the powerful calculating and pre-processing and post-processing functions of CFD software, by adding the penetration resistance terms, served as a source terms of moment, to the general fluid dynamic equations, we achieved seepage field simulation based on FLUENT software. The wetted surface of seepage is simulated with VOF ( Volume of fluid) method. Two examples of underground channel and square - shape dam shows that calculated seepage current, free surface and overflow location agreed very well with analysis and experimental results. The method provides a new vista for the seepage flow research.%传统上渗流问题的模拟都是求解渗透水头的拉普拉斯方程,为了利用CFD软件强大的计算及前后处理功能,通过在一般流体力学控制方程基础上增加渗透阻力的办法,以源项的形式导入FLUENT软件的求解器中实现了对渗流的数值模拟,并采用求解自由面的VOF法进行浸润面的计算.地下河槽及矩形土坝两个算例表明,无论对于渗流量、浸润面还是溢出点,计算结果与解析分析及实验数据高度吻合,表明本研究方法精确可靠,为研究渗流问题提供了新的途径.
展开▼
