基于浸没边界—格子Boltzmann方法的带自由液面的水力学问题模拟  

Simulation of Hydraulic Cases with Free Surface by the IB-LB Coupling Scheme

作　　者：张春泽[1] 米家杉 刁伟[1] 侯极[1] 

机构地区：[1]重庆交通大学西南水运工程科学研究所,重庆400016

出　　处：《水电能源科学》2017年第2期108-111,共4页Water Resources and Power

基　　金：重庆市科委自然科学基金计划资助项目(cstc2016jcyjA1935);重庆市教委自然科学基金计划资助项目(KJ1600514);重庆交通大学内河航道整治技术交通行业重点实验室开放基金重点项目(NHHD-201505)

摘　　要：为了高效、准确地通过数值方法研究涉及自由液面的流固耦合问题,将单相自由液面格子Boltzmann方法与浸没边界法相结合,提出可计算水流的液面波动及其与刚体相互作用的耦合模型,该耦合模型通过对耦合作用力的迭代,可确保浸没边界的无滑移条件的实现,并可提高耦合模型计算的稳定性和准确性。进而通过该耦合模型模拟和分析了宽顶堰溢流和自由拍门过流两种常见的水力学问题,验证了该模型的可行性和正确性。In order to numerically study the hydraulic problems involving complex free-surface flow and the water and solid construction interaction,a single-phase lattice Boltzmann（LB）model for free-surface flow coupling the immersed boundary（IB）method for fluid-structure interaction was proposed in this paper.The iterative force-correction for enhancing the accuracy and stability of the coupling scheme was promoted to realize non-slip boundary condition on IB.Finally,the coupling scheme was applied to simulate the broad-crested weir flow and flap gate flow.Good agreements between the simulated and empirical results show the feasibility and accuracy of the proposed scheme.

关 键 词：单项自由液面—格子Boltzmann法 浸没边界法 流固耦合 宽顶堰溢流 自由拍门过流 

分 类 号：TV13[水利工程—水力学及河流动力学]