岩土工程学报2017，Vol.39Issue(1)：178-184,7.DOI:10.11779/CJGE201701017
格子Boltzmann方法在斜坡非饱和带土体大孔隙流研究中的应用
Application of latticeBoltzmann method in macropore flowsin unsaturatedzone soil of slopes
摘要
Abstract
The establishment of macropore structure and infiltration simulation is primarily used to explain the mechanism and dynamic change of macropore flows.The macropore domain of unsaturated zone soil of slopes by means of CTscan is acquired. Moreover, based onthe lattice Boltzmann methodregardless of the external forces, qualitative and quantitative researcheson two-dimensional macropore flow seepage processare achieved after the discrete-velocity model, equilibrium distribution function and evolution equation of distribution function are established with boundary conditions and calculation assumptions accordingto dye tracer experiments. The resultsshow that:(1)This computing method can clearly and quantitatively describe the wetting front propulsion of macropore flows and prove that the macropore effect is obvious, but the effectdecreases when the seepage flow velocity gradually tends tobe stable.(2)The fluid velocity is faster in better connectivity and larger macropore size area, and the velocity decreases gradually from the center to both sides of macropore which means it isthe fastest inthecenter. (3)The quantity and velocity of fluid flowsat the lowerdepth is under the control of the macropore sizeat the above depth. The application of the lattice Boltzmannmethod can offer helps for macropore flows, especially three-dimensional seepage study.关键词
格子Boltzmann方法/非饱和带/大孔隙流/渗流过程Key words
latticeboltzmann method/unsaturated zone/macropore flow/seepage process分类
建筑与水利引用本文复制引用
徐宗恒,徐则民,王志良..格子Boltzmann方法在斜坡非饱和带土体大孔隙流研究中的应用[J].岩土工程学报,2017,39(1):178-184,7.基金项目
国家自然科学基金项目（41502340）；国家自然科学基金委员会-云南联合基金重点项目 （）
