Method for fluid simulation by using Boltzmann equation

A fluid simulation and equation technology, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve the problems of divergence of calculation results, error of calculation results, human factors of calculation results, etc., to ensure authenticity and high stability , to ensure the effect of accuracy

Pending Publication Date: 2019-03-01
上海索辰信息科技股份有限公司
View PDF1 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Steady-state algorithm: The traditional N-S equation simulation method uses an iterative solution algorithm to approach the steady-state solution result, which cannot calculate unsteady aerodynamic loads such as flutter problems caused by transient pressure fluctuations, and also cannot solve the aerodynamic noise of automobiles and warships well. Ship's hydrodynamic noise and other issues
[0005] Approximate solution: The traditional N-S equation simulation method is more suitable for solving the conventional non-separation flow, and cannot accurately calculate the large separation flow at a large angle of a

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
  • Method for fluid simulation by using Boltzmann equation
  • Method for fluid simulation by using Boltzmann equation
  • Method for fluid simulation by using Boltzmann equation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The invention is used to solve some complex fluid problems. The simulation analysis method based on molecular dynamics is a computer simulation method developed based on mature principles of molecular dynamics, combined with aircraft aerodynamic and thermal analysis, ground traffic aerodynamics, full-detail heat dissipation analysis, and aerodynamic noise analysis. system. The molecular dynamics method used in the method has high accuracy and convenience, and breaks through the limitation of high Mach number. At the same time, the optimized solver has found a good balance between speed and resource requirements for hardware.

[0025] In the detailed design stage of the aircraft aerodynamic scheme, this method is used to calculate and analyze the transient supersonic aerodynamics of the full-detailed aircraft model under the condition of large angle of attack and large separation, and calculate the air flow velocity field, pressure field, and The temperature field, shoc...

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 method and a system for fluid simulation by using Boltzmann equation. The method for fluid simulation by using Boltzmann equation comprises the following steps: surface meshenvelope treatment; generating spatial Cartesian grids; full transient flow field calculation. This method calculates the molecular cluster density function of each point in the flow field at different time. The particle distribution function satisfies the lattice Boltzmann equation. The method for simulating a fluid by using the Boltzmann equation adopts a full-detail geometric model, does not need to be simplified, and ensures the authenticity and accuracy of the simulation result; full transient algorithm, accurate calculation of the real transient aerodynamic force; accurate solution of separated flow at hgh angle of attack (or stall state); time-marching explicit algorithm, so that there is no divergence problem in the solution process; high-precision automatic solution, so that no manual intervention is needed and high stability is achieved.

Description

Technical field: [0001] The invention relates to a simulation method applied to fluid mechanics, in particular to a computer simulation method applied to fluid mechanics. Background technique: [0002] At present, in the field of simulation of fluid mechanics, most of the traditional calculation methods first discretize the macroscopic control equations, then use some numerical method to solve the discrete equations, and finally obtain the macroscopic physical quantities. The traditional simulation methods based on N-S equation (Navier-Stokes equation, describing the conservation of momentum of viscous incompressible fluid, referred to as N-S equation) and steady-state approximation have some shortcomings: [0003] A lot of manual simplification work is required: the geometric model must be simplified, the method cannot directly calculate the full-detailed calculation model, and cannot simulate the transient flow field characteristics of the real model. For complex models o...

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 陈灏
Owner 上海索辰信息科技股份有限公司
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