Global estimation method and system of fluctuation-generated turbulence hybrid model, equipment and terminal

A mixed model and mixed coefficient technology, applied in computer-aided design, calculation, design optimization/simulation, etc., can solve problems such as high sea surface temperature and low cline intensity

Pending Publication Date: 2021-11-05
THE FIRST INST OF OCEANOGRAPHY SOA
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Problems solved by technology

There is a large simulation deviation between theory and reality, which often leads to higher simulated sea surface temperature and lower cline intensity
[0003] Through the above analysis,

Method used

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  • Global estimation method and system of fluctuation-generated turbulence hybrid model, equipment and terminal
  • Global estimation method and system of fluctuation-generated turbulence hybrid model, equipment and terminal
  • Global estimation method and system of fluctuation-generated turbulence hybrid model, equipment and terminal

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Embodiment 1

[0112] The present invention has designed multiple sets of numerical experiments to answer the question of whether internal wave breaking and mixing play a key role in maintaining deep-sea stratification, and will answer the turbulent mixing caused by internal wave orbital velocity shear instability (hereinafter referred to as internal wave generating turbulent mixing ) is critical to the simulation of the upper ocean. Among them, the first part mainly expounds the establishment of the wave-induced turbulent mixing theoretical model independently developed by the author's team and the estimation of the global three-dimensional coefficient ( figure 1 ), laying the foundation for the second part of the research on the influence of upper ocean turbulent mixing on ocean circulation.

[0113] The first arrangement is as follows: Section 1.1 introduces the mixing coefficient of wave-induced turbulence in the Prandtl mixing model; 1.2 Estimation of the saturation equilibrium of wave-...

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Abstract

The invention belongs to the technical field of circulation mixing coefficient estimation, and discloses a global estimation method and system of a fluctuation-generated turbulence mixing model, equipment and a terminal. The global estimation method of the fluctuation-generated turbulence mixing model comprises: on the basis of a fluctuation-generated turbulence mixing coefficient, extracting internal tide information and WOA13 temperature and salt data through the combination of a satellite altimeter, and estimating a global three-dimensional structure of the internal tidal turbulence mixing coefficient; determining the construction of a global internal spectrum; and estimating the distribution characteristics of the global annual average internal wave-generated turbulence mixing coefficient BVIW. The internal tide information extraction comprises: obtaining, processing and filtering satellite along-orbit sea surface height abnormal data, and carrying out tide harmonic analysis on the filtered data to obtain an internal tide harmonic constant of which the global ocean tide frequency is M2. According to the deduced mixing coefficient, new mixing is not created, but a mixing process which does not exist in an existing framework and is rich in physical connotation is provided, and the important significance of fluctuation mixing on circulation is given.

Description

technical field [0001] The invention belongs to the technical field of estimation of circulation mixing coefficients, and in particular relates to a global estimation method, system, equipment and terminal of a wave-generated turbulence mixing model. Background technique [0002] At present: At the beginning of the last century, Prandtl proposed a semi-empirical and semi-theoretical hybrid model as an effective way to estimate turbulent transport flux. It borrows the concept of molecular free path in molecular kinetic theory, proposes a scalar called turbulent mixing length, and deduces the relationship between turbulent stress and average velocity shear by referring to the relationship between molecular viscous stress and velocity shear. In the actual application of this shear relationship, the experience in the industry is to only consider the shear of large-scale circulation in the model, and does not consider the effects of medium- and small-scale fluctuations (sea waves...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F30/28G06F113/08G06F119/14
CPCG06F30/20G06F30/28G06F2113/08G06F2119/14
Inventor 孙宝楠袁业立庄展鹏
Owner THE FIRST INST OF OCEANOGRAPHY SOA
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