水利水电科技进展Issue(6)：20-25,6.DOI:10.3880/j.issn.1006-7647.2015.06.004
局部断面收缩的溃坝水流三维数值模拟
Three-dimensional numerical simulation of dam-break water flow with local cross-section reduction
摘要
Abstract
A three-dimensional mathematical model that simulates the dam-break flood routing process that occurs during local cross-section reduction has been built to investigate the effects of local cross-section reduction on dam-break flow propagation. By calculating Reynolds-averaged Navier-Stokes equations basing on pressure implicit with splitting of operators( PISO) , the model is built on the basis of the RNG turbulence model. The governing equations of dam-break flow are discretized with the finite volume method, the free surface flow is dealt with using the fluid volumetric function approach. The physical variables are arranged on a staggered grid, and then the values of dam-break flow with local cross-section reduction are simulatively calculated. The simulation results are in agreement with physical model test results. The formation and propagation process of negative waves in a dam-break flood were examined with the model. The formation and propagation laws of negative waves as well as the variation characteristics of the water level were obtained.关键词
溃坝水流/局部断面收缩/负波/水位/数值模拟Key words
dam-break water flow/local cross-section reduction/negative wave/water level/numerical simulation分类
建筑与水利引用本文复制引用
戎贵文,袁岳,肖柏青,向英奇..局部断面收缩的溃坝水流三维数值模拟[J].水利水电科技进展,2015,(6):20-25,6.基金项目
国家自然科学基金(51579002,51309002) （51579002,51309002）
安徽省高等学校省级自然科学研究重点项目(KJ2013A094) （KJ2013A094）
