Unlock instant, AI-driven research and patent intelligence for your innovation.

Efficient two-phase flow meshless numerical model implementation method and device

A technology of numerical model and implementation method, applied in the field of numerical simulation, can solve the problems of increasing the number of computing nodes, shortening the calculation time step, and reducing the calculation efficiency of the two-phase flow SPH numerical model, so as to increase the time step and improve the calculation efficiency. Effect

Active Publication Date: 2021-09-07
OCEAN UNIV OF CHINA
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the two-phase flow SPH model can consider the influence of air changes in the chamber on the movement of water bodies, the number of calculation nodes is significantly increased due to the addition of air particles, and the calculation time step is greatly shortened due to the small air density. These factors are obvious Reduced computational efficiency for two-phase flow SPH numerical models

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
  • Efficient two-phase flow meshless numerical model implementation method and device
  • Efficient two-phase flow meshless numerical model implementation method and device
  • Efficient two-phase flow meshless numerical model implementation method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0061] The present invention is made in conjunction with the accompanying drawings and specific examples, but the scope of the invention is not limited thereto.

[0062] SPH method mainly by smooth kernel function to establish a link between the particles and the particles, and the introduction of integral expression. Visible to achieve smooth function SPH method has played a crucial role. The present invention uses the kernel function is a Gaussian smoothing kernel Smooth:

[0063]

[0064] Wherein: W represents a smooth kernel function; s distance between the two particles = || r-r '||, r i represents the position of the particle, r' represents the position of the particle j; gamma] is a coefficient cutoff radius, typically γ = 3 ; H smooth length, smooth Gaussian kernel function Δx is the initial pitch particles.

[0065] An important property is its Gaussian kernel smooth derivative can be directly calculated:

[0066]

[0067] Using the Navier - Stokes equations (N-S equ...

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 provides an efficient two-phase flow meshless numerical model implementation method and device, and belongs to the technical field of numerical simulation. The main process of the two-phase flow meshless numerical model implementation method comprises the steps that when air particles are needed, the air particles are generated in a computational domain, and the time step length is reduced; and when the air particles are not needed, the air particles in the computational domain are deleted, and meanwhile the time step length is increased. Through the method, the calculation efficiency of the two-phase flow SPH model can be improved by 8 times or more. The calculation efficiency of the two-phase flow SPH model can be remarkably improved, and the calculation cost is saved.

Description

Technical field [0001] The present invention belongs to the field of numerical simulation technology, particularly relates to a highly efficient two-phase numerical model meshless method embodiment, apparatus. Background technique [0002] With the social and economic development, human development and utilization of marine resources in order, built a large number of marine structures in the ocean. Dynamic characteristics of water under wave action offshore structures has been an important issue of concern to engineers. In recent years, with the calculated fluid dynamics numerical simulation technology matures, and numerical simulation analysis evolved as an efficient means of waves and marine structure interaction. [0003] The method smoothed particle hydrodynamics (Smoothed Particle Hydrodynamics, SPH) is a new form of Lagrangian particle meshless method, the initial problem is solved mainly for astrophysical dimensional open space, it has been applied to the marine engineerin...

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): G06F30/28G06F111/10G06F113/08G06F119/14
CPCG06F30/28G06F2111/10G06F2113/08G06F2119/14
Inventor 刘勇陈永焜刘晓方辉胡佳明
Owner OCEAN UNIV OF CHINA