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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 efficiently and accurately study the fluid-solid coupling problem involving free surface, the single-phase free-surface Lattice Boltzmann method is combined with the immersion boundary method to propose a method to calculate the liquid surface fluctuation and its coupling with the rigid-body interaction Model, the coupling model can realize the non-slip condition of the immersed boundary through the iteration of the coupling force, and can improve the stability and accuracy of the coupled model calculation. The coupling model is used to simulate and analyze two common hydraulic problems of overflow and free-flap over-flow of wide-weir. The feasibility and correctness of the model are verified.