Method for achieving WRF and CFD coupled simulation wind field based on Open FOAM

A technology for simulating wind fields and wind fields, which is applied in the field of computational wind engineering, can solve the problems of not giving full play to the advantages of WRF and CFD coupling mode, low efficiency, and heavy workload, so as to avoid subjective uncertainty and large deviation , high precision effect

Inactive Publication Date: 2018-09-21
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, the block difference based on experience has a huge workload and low efficiency; moreover, the result of subjective experience block difference has great uncertainty
[0009] In the calculation of the above two studies, the boundary conditions were set in addition to the velocity inlet, as well as th

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  • Method for achieving WRF and CFD coupled simulation wind field based on Open FOAM
  • Method for achieving WRF and CFD coupled simulation wind field based on Open FOAM
  • Method for achieving WRF and CFD coupled simulation wind field based on Open FOAM

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[0046] The latitude and longitude coordinates of the center of the selected target in Example 1 are: longitude 113.328778°, latitude 22.055561°, and the 30-meter resolution terrain data range obtained from the GIS geographic information system is: 21-23° north latitude and 113-114° east longitude.

[0047] 1.2) Establish a 3D flat terrain CFD model parametrically and generate a refined grid: The calculation domain of the 3D flat terrain CFD model is set to a rectangular parallelepiped area, and the complex terrain that affects the calculation domain is found according to the actual terrain. The calculation domain needs to include these Complex terrain, and the use of unstructured triangular prism grids to fully fit the complex geometric boundaries, among which, different areas of the computational domain use grids with different resolutions, and the three-dimensional flat terrain CFD model uses adjacent grids in the vertical direction. The grid size ratio is a fixed value σ grid; ...

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Abstract

The present invention belongs to the field of computing wind engineering, and discloses a method for achieving WRF and CFD coupled simulation wind field based on OpenFOAM. The method comprises the following steps: 1) establishing a complex terrain CFD model to generate a refined grid; 2) establishing a mesoscale WRF model to simulate complex terrain wind fields and processing wind field data of the WRF model; 3) achieving the data coupling of the WRF model and the complex terrain CFD model on the boundary, and obtaining refined grid wind field data with time varying on the four side interfacesand the top surface of the complex terrain CFD model; 4) calculating the coupled complex terrain CFD model so as to obtain a complex terrain wind field characteristic simulation result. The method for achieving WRF and CFD coupled simulation wind field based on OpenFOAM can adopt the program language supported by the computer, achieve the data coupling on the boundary of the WRF model and the complex terrain CFD model, and facilitate to improve the precision of the complex terrain wind resource assessment and wind field numerical simulation.

Description

technical field [0001] The invention belongs to the field of computational wind engineering, and more specifically relates to a method for realizing WRF and CFD coupled simulation of wind field based on OpenFOAM. Background technique [0002] When studying the wind field of complex terrain, the first difficulty is how to give a reasonable inlet boundary condition. The rationality of the inlet boundary is an important factor affecting the calculation results. Whether it is a wind tunnel test or a numerical simulation, a lot of simplifications have been made when the inlet boundary is given, which may lead to a large deviation between the results and the actual situation. [0003] In recent years, with the rapid development of weather forecast models, mesoscale weather forecast models have been widely used, among which the WRF model is the most popular. WRF is a new-generation mesoscale numerical model system jointly developed by the National Center for Atmospheric Research, ...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 刘震卿吴晓波熊世树
Owner HUAZHONG UNIV OF SCI & TECH
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