Method for achieving WRF simulation wind field downscaling processing based on PALM

Abstract

The name of the invention is PALM-based method for realizing WRF simulation wind field downscaling processing. The invention belongs to the field of urban meteorological environment, and discloses a PALM-based method for realizing WRF simulation wind field downscaling processing, and the method comprises the following steps: 1) building a complex terrain CFD model based on GIS data; 2) using a mesoscale WRF model to simulate and provide meteorological variables required by the PALM model; 3) realizing data coupling of the WRF model and the complex terrain CFD model; 4) extracting an initial value of the complex terrain CFD model at the initial calculation time and refined three-dimensional grid meteorological data changing along with time on the boundary; 5, the PALM is operated, and a high-resolution wind field simulation result is obtained.By means of the method, a computer-supported programming language can be used, a CFD model of a complex terrain and a building can be established in a parameterized mode, data coupling of the WRF model and the CFD model is achieved, and improvement of precision of wind field numerical simulation and air pollution distribution in an urban boundary layer is facilitated.

Description

technical field [0001] The invention belongs to the field of urban meteorological environment, and more particularly relates to a method for realizing downscaling processing of WRF simulated wind field based on PALM. Background technique [0002] When studying complex terrain, especially meteorological and air quality problems in the urban boundary layer, the primary problem is how to obtain accurate wind fields. In recent years, with the rapid development of meteorological forecasting models, mesoscale meteorological forecasting models have been widely used, among which the WRF model is the most popular. WRF is a new generation of mesoscale numerical model system jointly developed by the National Center for Atmospheric Research, the National Center for Environmental Prediction and many universities and research institutions. The WRF mode adopts ArakawaC staggered grid points in the horizontal direction and terrain following mass coordinates in the vertical direction, and h...

AI Technical Summary

Problems solved by technology

However, in the technical solution of this patent, only the influence of terrain is considered, and the effect of buildings is not considered. The role of the latter in the urban boundary layer is very important

In addition, the control equation of the CFD method based on OpenFOAM assumes that the atmosphere is in a state of hydrostatic equilibrium, which is inconsistent with reality and affects the accuracy of the simulated wind field.

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