Method for designing automatic simulation calculation of flow state of large slow flow landscape water body in multi-scheme manner

Abstract

The invention relates to a method for designing automatic simulation calculation of the flow state of a large slow flow landscape water body in a multi-scheme manner. The method comprises the steps of: firstly, establishing flow evaluation indexes of a large slow flow water body; then carrying out once meshing for simulation calculation of multiple water inlet schemes; and integrating all simulation calculation processes by programming and establishing project files (*.CAS (Chemical Abstracts Service) files) and recording script files (*.JOU (journal) files), self-correcting boundary conditions by programs and calculating each scheme so as to realize automation of simulation calculation of the multiple scheme. By applying the method provided by the invention, once meshing and boundary condition arrangement are only needed, a large quantity of time is saved. Especially, when more designed possible water inlets exist, simulation calculation on all schemes is difficult to carry out by the existing calculating method. Compared with the scheme obtained by the existing calculating method, the optimal scheme screened by the method has the advantages that the mean flow rate of the slow flow water body is remarkably increased and is more uniformly distributed, the water area in a stagnation zone is remarkably reduced, hydrodynamic force conditions of the slow flow water body are improved, and the quality of the slow flow water body is improved.

Description

technical field [0001] The invention relates to a design method for urban large-scale slow-flow landscape water circulation. Background technique [0002] At the present stage, most of the studies on the flow simulation of landscape water bodies using Computational Fluid Dynamics (CFD) software manually select several schemes for comparison. These methods have large human factors and strong subjectivity, and may not be able to select the optimal solution. This situation is due to the trapped CFD software itself. CFD software needs to divide the entire fluid into grids before calculating the flow state, and make specific settings for the boundary conditions such as inlets and outlets, and some even refine the grids at the inlets and outlets to enhance the simulation effect. Therefore, if the location and size of the inlet are changed during the design process, it will involve re-dividing the grid and setting boundary conditions. The number of large-scale landscape water bod...

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Problems solved by technology

[0003] In view of the current problems that many urban water bodies are closed, stagnant, and water quality is extremely easy to deteriorate, the water circulation method is adopted to increase the flow rate of the water body, improve the hydrodynamic conditions, and then improve the water quality of the water body and the quality of the water environment

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