Method for carrying out porous medium and multiphase fluid mixed simulation by using virtual particle phase

A multiphase fluid and porous media technology, which is applied in design optimization/simulation, instrumentation, electrical digital data processing, etc., can solve problems such as the inability to deal with multiphase fluid and porous material co-simulation in general, and achieve a unified model that is flexible and Consistent effect on stabilization, mass and momentum transfer

Active Publication Date: 2021-10-08
NANKAI UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the current particle method simulation technology cannot generally deal with the joint simulation of multiphase fluid and porous material, and proposes a novel fluid simulation algorithm based on virtual particle phase, which is used for porous media materials and multiphase materials. joint dynamics simulation

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  • Method for carrying out porous medium and multiphase fluid mixed simulation by using virtual particle phase
  • Method for carrying out porous medium and multiphase fluid mixed simulation by using virtual particle phase
  • Method for carrying out porous medium and multiphase fluid mixed simulation by using virtual particle phase

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Embodiment 1

[0114] The invention provides a method for performing mixed simulation of porous medium and multiphase fluid by using virtual particle phase. According to the theory introduced above, the method of the present invention can organize and write the algorithm program according to the following steps, and then run the algorithm program to implement actual simulation. The program algorithm execution steps are as follows:

[0115] Step 1: Initialize the particle properties of the fluid scene, including position, velocity, whether the particle type is a solid particle or a fluid particle, and if it is a fluid particle, the volume fraction of each phase it contains;

[0116] After initialization, in the calculation of each time step,

[0117] Step 2: Calculate the density ρ of all solid particles using the standard SPH interpolation method s，i and the density ρ of fluid particles f，i ;

[0118] Step 3: Calculate N of fluid particles f , that is, the sum of general SPH kernel func...

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Abstract

The invention relates to a method for carrying out porous medium and multiphase fluid mixed simulation by using a virtual particle phase, which comprises the following steps of: calculating absorption phases of solid external fluid and solid internal fluid by using the virtual particle phase, further calculating mass and momentum transmission among different phases, and obtaining discretization implementation based on an SPH method. According to the method, the internal fluid and the external fluid are modeled in a unified mode through the volume fraction and the mixing model, constant particle deletion and insertion are avoided, the real solid fluid mixing simulation effect is achieved, an artistic control scheme is provided, and the porous medium and fluid mixing simulation efficiency and effect are comparable to the effect of a current advanced method in the industry.

Description

technical field [0001] The invention relates to the field of computer graphics fluid dynamics simulation, in particular to a dynamics simulation method and system for porous solid media and multi-component fluids. Background technique [0002] Research work on porous media is ongoing in many areas of computer graphics, such as computer graphics work involving cloth, sand or dirt, and volumetric solids. Porous media are different from impermeable solids that only interact with fluids on the surface. When fluids interact, porous media exhibit stronger coupling, and the interaction with fluids occurs both on the surface and inside the media. These flow phenomena are far more complex than single-phase fluid flow in open spaces, and they may involve many simultaneous physical processes, such as fluid mass transfer in porous solids, absorption and emission at solid surfaces, hydrophobic and hydrophilic behavior, capillary effects and multiphase flow. [0003] Lenaerts in "Porous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/25G06F30/28G06F113/08G06F119/14
CPCG06F30/28G06F30/25G06F2113/08G06F2119/14
Inventor 任博徐奔李晨锋
Owner NANKAI UNIV
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