High-precision two-phase fluid interface capturing method

A fluid interface, high-precision technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as complex geometric calculations and limited accuracy improvement

Inactive Publication Date: 2011-07-20
XI AN JIAOTONG UNIV
View PDF2 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction of the interface is the premise of computing fluid transport and visualization. Nowadays, it is more common to use a line segment with an arbitrary slope to approximate the real interface line. In 1995, Barth proposed a method to iteratively calculate the position of the line segment using the least square method, and obtained It is widely used, but every time the interface is constructed, sev...

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
  • High-precision two-phase fluid interface capturing method
  • High-precision two-phase fluid interface capturing method
  • High-precision two-phase fluid interface capturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] Such as figure 1 shown, which includes the following steps:

[0036] 1) Model the calculation area to generate an initial high-quality unstructured triangular mesh;

[0037]2) According to the calculation conditions, initialize the VOF phase function F value for different fluid phases, and at the same time give the fluid velocity field;

[0038] 3) The two-step calculation of "prediction-correction" is used to realize the adaptive refinement of the grid: firstly, the transmission of the VOF phase function F in the flow field is calculated to estimate the position of the phase interface at the next moment, and then F∈(0, 1) The phase interface grid is subdivided and encrypted, and then the fluid state before the pre-calculation is recalculated on the subdivided grid to obtain the distribution of the phase function F at the next time on the subdivided ...

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 high-precision two-phase fluid interface capturing method, comprising the steps of: modeling a computation region and generating an initial high-quality unstructured triangular grid; setting computation parameters and initializing the VOF (Volume Of Fluid) phase function value F for different fluid phases; firstly predicating and computing the distribution of fluid phasefunctions by adopting 'prediction-correction', performing self-adaptive subdivision on a grid unit at the phase interface according to the phase function values, then re-computing the distribution offluid phase functions on the subdivided grid unit; after the computation on the subdivided grid unit is completed, remerging sub-grid units, with the specified phase fluid completely flowing out or completely filled therein, into the grid unit before subdivision and obtaining the phase function value F of the grid, and constructing the phase interface by adopting a PLIC (Piecewise Linear Interface Construction) method. The method of the invention can improve the phase interface capturing precision with no need of massively increasing the number of the grid unit, and simultaneously, as the time and the phase interface vary, the method has no need of regenerating all of the grids, so the algorithm executing efficiency is high.

Description

technical field [0001] The invention relates to a self-adaptive unstructured triangular mesh generation method and a two-phase interface construction method, in particular to a high-precision two-phase fluid interface capture method. Background technique [0002] Two-phase or multiphase flow widely exists in nature and engineering. With the rapid development of computer technology, numerical simulation has become an effective method for studying multiphase flow. When studying gas-liquid / liquid-liquid two-phase flow, since there is a moving phase interface, and the fluid physical and flow state may change drastically on the free interface, it is very important to consider the deformation and displacement of the phase interface and the treatment of the interface Whether the two-phase interface can be accurately captured is related to the correctness and rationality of the entire flow field calculation. The VOF (Volume of Fluid) method, as an interface capture method, has been...

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): G06F19/00
Inventor 陈斌武利龙黄萌
Owner XI AN JIAOTONG UNIV
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