Numerical simulation method of migration, accumulation and float removal processes of water surface floats

Abstract

The invention provides a numerical simulation method of the migration, accumulation and float removal processes of water surface floats. The method is characterized by comprising the following steps: (1) simulation of a float migration process: based on the stress conditions of each float in a float set F in a water moving process, generalizing each float into an entity with center of mass, and obtaining the change processes of six attributes of each float entity; (2) simulation of a float accumulation process: combining the floats with the same discrete grid number Q<ij> into a new float, obtaining the mass, moving speed and center-of-mass coordinates of the new float again, and bringing the new float into the float set; and (3) simulation of a float removal process: removing the floats according to a float removal plan. The method can quickly and accurately simulate the migration rule of the floats in water so as to improve the comprehensive management efficiency of the seawater floats.

Description

technical field [0001] The invention belongs to the fields of hydraulics, environmental management and environmental simulation, and in particular relates to a numerical simulation method for the migration, accumulation and cleaning process of floating objects on the surface of a water body. technical background [0002] Floating matter is solid waste that floats on the surface of water bodies depending on buoyancy, including logs, branches, straw, straw, plastic products, and human and animal carcasses. The existence of floating objects has adverse effects on water quality, water surface landscape, water supply, aquatic products, shipping, etc., not only destroying the ecological environment, but also threatening drinking water safety. Especially in the reservoir area with power generation function, floating objects flow down the river and tend to gather in the concave bank of the river and in front of the barrage, which not only affects the power generation head, reduces t...

AI Technical Summary

Problems solved by technology

The existing research provides technical reference for further development of floating debris numerical simulation to a certain extent, but the existing research still cannot quickly and accurately simulate the process of floating debris from generation to accumulation or cleaning

[0004] Floating objects are subjected to the dual dynamic effects of water and wind in the water body. It is not comprehensive enough to simulate the velocity of floating objects simply by replacing the velocity of floating objects with the flow velocity of water. Moreover, the mathematical model of water flow adopts a discretized grid form to simulate the velocity of the grid. There is a certain difference between the speed of the floating point and the speed of the center of floating matter; and in the accumulation of floating matter, the floating cleaning measures will greatly affect the total amount and migration of floating matter

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