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Multi-component fluid simulating method and multi-component fluid simulating device based on Helmholtz free energy

A technology of multi-component fluid and simulation method, which is applied in the field of multi-component fluid simulation method and device based on Helmholtz free energy, can solve problems such as difficulty in expansion and large memory overhead, and achieves saving memory overhead and making it easy to use. Simulate the effect of expansion

Active Publication Date: 2017-04-19
TSINGHUA UNIV
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Problems solved by technology

But they did not make any changes to the original Cahn-Hilliard equations, so they can only be used to simulate the most basic phenomena
At the same time they adopted the lattice Boltzmann method (LBM), which requires huge memory overhead and is difficult to be extended

Method used

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  • Multi-component fluid simulating method and multi-component fluid simulating device based on Helmholtz free energy
  • Multi-component fluid simulating method and multi-component fluid simulating device based on Helmholtz free energy
  • Multi-component fluid simulating method and multi-component fluid simulating device based on Helmholtz free energy

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Embodiment Construction

[0018] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the present invention. Invented some embodiments, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0019] Such as figure 1 As shown, this embodiment discloses a multi-component fluid simulation method based on Helmholtz free energy, including:

[0020] S1. Use the mass percentage of each component to represent the particles of the multi-component fluid to be simulated, and design the Helmholtz free energy equation of each particle, where the He...

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Abstract

The invention discloses a multi-component fluid simulating method and a multi-component fluid simulating device based on Helmholtz free energy, wherein a multi-component fluid simulating scene can be expanded and memory overhead can be saved. The method comprises the steps of representing particles of to-be-simulated multi-component fluid by means of mass percent of each component, and designing a Helmholtz free energy equation of each particle; integrating a Cahn-Hilliard equation which utilizes the Helmholtz free energy equation into a preset particle simulator, and obtaining a Navier-Stokes-Cahn-Hilliard model; and simulating the movement of the to-be-simulated multi-component fluid by means of the Navier-Stokes-Cahn-Hilliard model.

Description

Technical field [0001] The invention relates to the technical field of fluid simulation, in particular to a method and device for multi-component fluid simulation based on Helmholtz free energy. Background technique [0002] In the past ten years, multi-component fluid simulation has received more and more attention and research. Generally, multi-component fluids can be divided into two categories, namely, mixing and non-mixing. The mainstream simulation methods are also divided into two categories: grid-based and particle-based. For immiscible multi-component fluids, Premoze et al. published a paper "Particle-based simulation of fluids" in 2003, and adopted a method called moving-particle semi-implicit (MPS). Hong et al. published a paper "Discontinuous fluids" in 2005, using the volume-of-fluid (VOF) method. Boyd and Bridson published a paper "Multiflip forenergetic two-phase fluid simulation" in 2012, which further developed the method. Misztal et al. published a paper "Mul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 胡事民杨涛常健任博
Owner TSINGHUA UNIV
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