【摘要】 根据二维浅水波方程的特点,应用由格子Boltzmann方程展开的多尺度方程,建立了一个能模拟二维明渠非恒定流的格子Boltzmann模型。通过对一维溃坝波和二维圆形溃坝波的模拟分析,验证了该模型的有效性。以某水电站尾水渠为例,模拟分析了由机组甩负荷和增负荷引起的水位波动规律,为尾水渠的设计提供了依据。更多还原

【Abstract】 A special lattice Boltzmann model for simulating 2D unsteady open channel flows is built by combining the ChapmanEnskogExpansion derived multiscale equations that approximate the form of shallow water equations To verify the model typical 1D and 2D dam breaks are simulated, and the results show agreement with analytical method and other modelsAs an actual example, the unsteady flows in the tailrace channel of a hydropower plant are calculated更多还原