A numerical method of combined SPF-MEM-LBM on the rockfall-induced surge and its application  

作　　者：MENG Qiu-jie SONG Yi-xiang HUANG Da HUANG Run-qiu ZHONG Zhu HUANG Wen-bo LIU Yang 

机构地区：[1]School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China [2]College of Geology Engineering and Geomatics,Chang’an University,Xi’an 710054,China [3]State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China

出　　处：《Journal of Mountain Science》2022年第1期167-183,共17页山地科学学报（英文）

基　　金：supported by the National Natural Science Foundation of China (Nos.41902290,42007276,41972297);Program of Hundred Promising Innovative Talents in Hebei provincial education office (No.SLRC2019027);Natural Science Foundation of Hebei Province (Nos.D2020202002,D2021202001)。

摘　　要：Rockfalls in reservoirs are prone to induce surges, posing a severe threat to passing vessels and facilities. A scheme combined Single-phase freesurface method(SPF), momentum exchange method(MEM), and Lattice Boltzmann method(LBM) is proposed to predict the impact of rockfall-induced surges. First, the LBM-SPF model is used to simulate the motion of the free surface, and the MEM model is used to calculate the hydrodynamic force acting on rock mass. To address the incompatibility issue arising from the coupling of LBM-SPF model and MEM model, a correction scheme inside the solid is induced. The simulation results of the single particle and double particle sedimentation in cavity show the feasibility and accuracy of the method designed in this paper. Moreover, the validation experiments of Scott Russel’s wave generator show that the proposed scheme can simulate wave profile stably. The simulation results emphasize that the waves induced by rockfalls have a significant impact on the safe operation of the Laxiwa dam and the passing vessels in the reservoir.

关 键 词：Lattice Boltzmann method Momentum exchange method Fluid solid coupling Rockfall induced surges Reservoir bank slope 

分 类 号：P642.2[天文地球—工程地质学] U698[天文地球—地质矿产勘探]