基于局部分级时间步长方法的水沙耦合数学模拟
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胡鹏,韩健健,雷云龙
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Coupled modeling of sediment-laden flows based on local-time-step approach
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Peng HU,Jian-jian HAN,Yun-long LEI
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表 1 局部时间步长技术模拟定床溃坝水流的成本和精度 |
Tab.1 Computational cost and quantitative accuracy for simulating dam-break flow over fixed beds using local-time-step |
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工况 | L | Tr | L2(h) | L2(u) | 无摩阻工况 | 1(GTS) | 1.0 | 0 | 0 | 2 | 0.59 | 9.5×10−4 | 0.14 | 3 | 0.39 | 10−2 | 1.40 | 4 | 0.31 | 4.8×10−2 | 1.91 | 5 | 0.26 | 1.1×10−1 | 2.21 | 6 | 0.26 | 9.3×10−2 | 2.78 | 有摩阻工况 | 1(GTS) | 1.0 | 0 | 0 | 2 | 0.57 | 1.3×10−3 | 10−2 | 3 | 0.36 | 2.8×10−3 | 1.8×10−2 | 4 | 0.27 | 5.2×10−3 | 2.3×10−1 | 5 | 0.24 | 4.3×10−2 | 7.4×10−1 | 湿床面工况 | 1(GTS) | 1.0 | 0 | 0 | 2 | 0.58 | 2.4×10−3 | 2.1×10−2 | 3 | 0.36 | 5.7×10−3 | 5.0×10−2 | 4 | 0.36 | 5.7×10−3 | 5.0×10−2 |
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