Mesodynamic method and system for unbalanced compressible fluid

Through mesoscopic dynamics, the problem of numerical instability in simulated unbalanced compressible fluid systems is solved, and stable and accurate non-equilibrium behavior portrayal and numerical stability are achieved.

CN119740504AActive Publication Date: 2025-04-01SUN YAT SEN UNIV
3 Cites 0 Cited by

Patent Information

Application Number
CN202411725335.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-28
Publication Date
2025-04-01
Estimated Expiration
2044-11-28

AI Technical Summary

Technical Problem

The prior art is difficult to portray detailed fluid mechanics and thermodynamic unequilibrium behavior stably and accurately, especially when simulating unequilibrium compressible fluid systems.

Method used

Through a mesoscopic kinetic method for a non-equilibrium compressible fluid, it includes initializing the acquisition of macroscopic physical quantities, solving the discrete equilibrium distribution function, determining the boundary conditions, and summing the dynamic moments to obtain the kinetic equation that satisfies the conservation conditions, and updating iterative macroscopic physical quantities based on this equation.

Benefits of technology

It realizes stable and accurate characterization of fluid mechanics and thermodynamic unequal behavior, improves numerical stability, and can take a larger time step, suitable for simulating unequalized compressible fluid systems.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a mesoscopic kinematics method and system for unbalanced compressible fluid. The mesoscopic kinematics method comprises the steps that initialization is conducted according to specific working conditions of an unbalanced compressible fluid system to obtain macroscopic physical quantities; solving a discrete equilibrium state distribution function according to the relation between the macroscopic physical quantity and the kinetic moment, and performing Taylor expansion on the discrete equilibrium state distribution function to obtain a first discrete distribution function; determining a second discrete distribution function according to the direction of the discrete speed and boundary conditions set by specific working conditions of the unbalanced compressible fluid system; processing the first discrete distribution function and the second discrete distribution function to obtain a kinetic equation meeting a conservation condition; and updating the macroscopic physical quantity based on the kinetic equation, and judging whether the time iteration step number meets a preset cycle termination condition or not. According to the unbalanced compressible fluid-oriented mesoscopic kinematics method and system provided by the embodiment of the invention, detailed hydrodynamic and thermodynamic unbalanced behaviors can be accurately described.
Need to check novelty before this filing date? Find Prior Art