Advection mode system suitable for complex terrain and operation method of advection mode system

Abstract

The invention discloses an advection mode system suitable for complex terrains and an operation method thereof, and the advection mode system is composed of a terrain filtering module, a coordinate conversion module, an advection mode time integration module, a horizontal advection module, a vertical advection module and a fractal dimension error correction module. The input of the advection mode system is an external driving wind field and input scalar distribution, and the output of the advection mode system is forecasted advection scalar space distribution. When the advection mode system application program runs, a corresponding calculation process is started and serves as a sub-process of the advection mode system application program to carry out numerical calculation, a corresponding calculation function is completed, and the advection mode system program is implemented to provide target advection function service. The advection mode system suitable for the complex terrains can be suitable for different numerical modes, can effectively process the complex terrains, and has good properties.

Description

technical field [0001] The invention belongs to the technical field of advection mode, and in particular relates to an advection mode system suitable for complex terrain and an operation method thereof. Background technique [0002] The atmospheric advection process describes the movement of advective substances such as water vapor, chemical substances and aerosols in the atmosphere with the air, and is the basic process of atmospheric motion. Numerical advection models are used to solve the governing equations describing advection motion by numerical methods on high-performance computers. They are widely used in atmospheric simulation systems and are the basis for the development of all atmospheric models. For example, the water vapor transport process is simulated in numerical weather forecasting, the advection process of various chemical substances is simulated in geochemical models, and the distribution of pollutants is simulated in air quality forecasting. Therefore, t...

AI Technical Summary

Problems solved by technology

[0004] So far, there is no satisfactory advection scheme that can satisfy all the above properties, and the satisfaction of some properties may affect other properties of the scheme

For example, the high-precision format in the advection scheme generally produces non-physical numerical oscillations near discontinuities or large gradients. In order to eliminate these spurious oscillations, it is necessary to introduce some limiters to suppress oscillations, and the addition of limiters will increase the number used in the format construction. template, thereby reducing the computational efficiency of the method

Similarly, the introduction of positive definite limiters and conformal limiters will also increase the amount of computation and reduce computational efficiency

At the same time, the introduction of these limiters may reduce the calculation accuracy of the numerical scheme

Images