Numerical number simulation method of complex river network shunting

A technology of numerical simulation and mathematical model of water flow, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as uneven distribution of river network flow, avoid excessive calculation time cost, overcome quality and Momentum is not locally conserved and has a wide range of effects

Inactive Publication Date: 2017-12-05
PEARL RIVER HYDRAULIC RES INST OF PEARL RIVER WATER RESOURCES COMMISSION
View PDF2 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The numerical simulation method of complex river network diversion provided by the present invention aims to establish a plane two-dimensional numerical model of the river network under the joint action of runo

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
  • Numerical number simulation method of complex river network shunting
  • Numerical number simulation method of complex river network shunting
  • Numerical number simulation method of complex river network shunting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0029] (1) Establish a two-dimensional non-constant shallow water equation system, as follows:

[0030]

[0031]

[0032]

[0033] In the formula: η is the water level; h is the still water depth; t is the time; x, y, z are the right-hand Cartesian coordinate system; u, v are the components of the flow velocity in the x, y direction; P a is the local air pressure; ρ is the water density, ρ 0 is the reference water density; is the Coriolis force; and is the acceleration caused by the earth's rotation; S xx , S xy , S yx , S yy is the component of radiation stress in each direction; τ sx , τ sy , τ bx , τ by is the flow shear stress at the boundary between the water surface and the river bed; T xx , T xy , T yx , T yy is the horizontal viscous stress; S is the source-sink term; u s , v s is the flow velocity of the source-sink item.

[0034] (2) Build a grid system that mixes quadrilateral grids and triangular grids ...

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 relates to the technical field of complex river network flow field numerical simulation, and discloses a complex river network shunting numerical simulation method. The method comprises the steps that by means of a two-dimensional non-constant shallow water equation set, a quadrilateral mesh and triangular mesh hybrid network system is built, and a finite volume method is used for performing dispersion, so that a planar two-dimensional numerical model of a complex river network is built, and actual water flow motion features in the river network are simulated; by means of measured data rate, a simulated result is determined, and related parameters of the model are determined; then, shunting nonuniform coefficient measuring flow distributed features are introduced, and shunting nonuniform coefficients of a plurality of shunting joints in the river netework are calculated. In this way, the problems that spatial limits of a one-dimensional model are caused and the three-dimensional model calculation time cost is excessively large are avoided, and the defect that the mass and momentum partial non-conservation phenomenon of a multi-dimensional coupling model in linkage appears is overcome.

Description

technical field [0001] The invention relates to the technical field of numerical simulation of complex river network flow field, in particular to the numerical simulation of flow distribution of complex river network with multiple branches. Background technique [0002] Many large rivers around the world, such as the Nile, the Mekong, the Mississippi, and the Pearl River, often branch into the downstream estuaries and develop into complex river networks. These river networks are composed of many branched channels and mouths. The movement of water flow in a certain branch has an impact on the whole river network. Because the river network is mostly located in the estuary area, it is not only affected by the upstream runoff, but also affected by the tide of the open sea, which makes the dynamics in the river network very complicated. [0003] The flow distribution of branched channels has always been a classic problem in the study of river dynamics. It is related to the dist...

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
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 吴尧吴门伍杜静卢陈高时友涂向阳佟晓蕾杨裕桂袁菲
Owner PEARL RIVER HYDRAULIC RES INST OF PEARL RIVER WATER RESOURCES COMMISSION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap