Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Dynamic simulation method for calculating unsteady Langmuir circulation

A dynamic simulation, unsteady technology, used in computing, climate sustainability, instrumentation, etc., to solve problems such as inability to reflect the dynamic effects of the langmuir circulation, inaccuracy, etc.

Active Publication Date: 2019-08-06
TIANJIN UNIV
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The intensity of the Langmuir circulation is mainly affected by the sea surface wind force and wave size. Therefore, some current parametric calculation methods of the Langmuir circulation that do not consider the temporal and spatial variation characteristics of the sea state are inaccurate, inconsistent with the actual Langmuir circulation phenomenon in the ocean, and cannot reflect the Langmuir circulation. The Dynamic Influence of Circulation on Ocean Hydrological Elements

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Dynamic simulation method for calculating unsteady Langmuir circulation
  • Dynamic simulation method for calculating unsteady Langmuir circulation
  • Dynamic simulation method for calculating unsteady Langmuir circulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0029] A dynamic simulation method for calculating unsteady Langmuir circulation, comprising:

[0030] 1. Coastal ocean wave model (SWAN): SWAN is the third-generation coastal ocean wave numerical model. It adopts a balance equation based on the principle of energy conservation and uses a fully implicit finite difference scheme. It is unconditionally stable and enables the calculation of spatial grids and time The step size is not limited. In the source and sink terms of the balance equation, wind input, three-phase wave, four-phase wave interaction, bottom friction, wave breaking and white sea dissipation are considered, and are widely used in wave simulation in shallow water conditions. The SWAN mode can be used to output the wave paramete...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a dynamic simulation method for calculating unsteady Langmuir circulation. The dynamic simulation method comprises the following steps: (1) calculating a wave field within a certain time range by adopting an offshore wave mode, and outputting wave parameters; (2) inputting the obtained wave parameters into a Stokes drift velocity calculation model, and calculating to obtaina stokes drift velocity; (3) improving the Prussian ocean mode, and enabling the Prussian ocean mode to comprise a parametric calculation method of unsteady Langmuir circulation; and (4) inputting the obtained stokes drifting speed into an improved Prussian ocean mode, and simulating an ocean dynamic process containing the unsteady Langmuir circulation in real time to obtain an ocean temperature,salinity and flow velocity field containing the influence of a physical process of the unsteady Langmuir circulation. According to the method, the effect of the unsteady Langmuir ring current is added into the turbulence energy parameterization calculation method of the ocean ring current model, the influence of the unsteady Langmuir ring current on ocean elements can be dynamically simulated, the physical process of an ocean numerical mode can be perfected, and a more accurate ocean forecasting model is obtained.

Description

technical field [0001] The invention relates to a dynamic real-time simulation technology of a physical ocean model, in particular to a dynamic simulation method for calculating unsteady Langmuir circulation. Background technique [0002] The Langmuir circulation refers to a pair of antisymmetric rotating vortices with the axis parallel to the wind direction occurring in the upper ocean, which is one of the main manifestations of wave-current interaction. Due to the unsteady nature of the sea surface wind field, the unsteady wind stress on the sea surface is induced, and then the vortex perpendicular to the sea surface is formed. And because the wind blows the waves, the waves produce Stokes drift. Under the influence of Stokes drift, the vortex perpendicular to the sea surface gradually moves horizontally, and finally forms the Langmuir circulation. The existence of the Langmuir circulation enhances the vertical shear instability of the upper ocean and directly contributes...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23Y02A90/10
Inventor 曹育邓增安
Owner TIANJIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com