Self-adaptive simulative method of dam break flood on complex border and actual landform

Abstract

The invention discloses a self-adaptive simulative method of dam break flood on a complex border and an actual landform. The method comprises the step of shifting a deformed GRP format with partial differential equation and a self-adaptive grid based on variation principle; the former one resolves aextended riemann problem through boundary method, thus the numerical flux for the deformed PED includes the influence of a riverbed bottom part; the source item of a centre discrete also includes the influence on the flow field; the static flow is precisely ensured on an unstructured triangular grid; the later one realizes the adjustment of the grid position, realizes the conservation interpolation of the physical quantity on the new grid, thereby improving the approaching degree of the unstructured triangular grid for physical quantity and ensuring the static flow. The method developed in the invention can effectively improve the resolution ratio, the calculation precision and the calculation efficiency when the shallow-water wave is simulated, thereby providing a new technical scheme for simulating the hydrodynamic force and eutrophication process of the break dam flood.

Description

technical field [0001] The invention relates to the technical fields of environment and water conservancy engineering, in particular to an adaptive simulation method for dam break floods on complex boundaries and actual topography. Background technique [0002] There are many dangerous reservoirs in my country and they are widely distributed, and their outburst floods have become a prominent problem in the national disaster prevention and mitigation work. In particular, the No. 1 document of 2011, "The Decision of the Central Committee of the Communist Party of China and the State Council on Accelerating the Reform and Development of Water Conservancy", further clarified the strategic position of water conservancy under the new situation. Flood risk, the realization of disaster-causing process forecast and disaster assessment, and the numerical calculation of dam break flood in the design and management of water conservancy projects have become one of the important research ...

AI Technical Summary

Problems solved by technology

However, the hydrodynamic process of dam break floods is generally in the form of jet flow, and there are large differences in time and space with the flow field and concentration field far away from this area, and we often only care about local extreme values ​​

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