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The invention discloses a method for constructing a variable-porosity porous medium

A technology of porous media and construction methods, applied in 3D modeling, instruments, calculations, etc., can solve problems such as model structure differences affecting calculation results, and achieve a controllable construction process

Pending Publication Date: 2019-05-31
HOHAI UNIV
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Problems solved by technology

The number, position and pore channel characteristics of the two model particles are completely different, resulting in a large difference in the structure of the model and affecting the calculation results

Method used

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  • The invention discloses a method for constructing a variable-porosity porous medium
  • The invention discloses a method for constructing a variable-porosity porous medium
  • The invention discloses a method for constructing a variable-porosity porous medium

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing and embodiment:

[0020] Such as figure 1 As shown, using the method for constructing variable pore porous media of the present invention to construct porous media models with target porosities of 0.50, 0.45, and 0.40, the steps are as follows:

[0021] (1) Generate an initial model: Randomly distribute multiple spherical particles in the region to generate an initial model of porous media PM0. After calculation, the initial porosity of the initial model PM0 is n 0 =0.55, the initial average radius is r 0 =0.001m, the number of particles in the initial model in this embodiment is 343.

[0022] (2) Set the target parameters: according to the construction requirements, determine the number of target models and the corresponding porosity size n k . In this embodiment, the number of target models is set to 3, and the corresponding porosity sizes are n 1 =0.50,n 2 =0.45, n ...

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Abstract

The invention discloses a method for constructing a variable-porosity porous medium. The method comprises the following steps: randomly distributing a plurality of spherical particles in an area; determining the target porosity of the porous medium target model, determining the increase length of the particle radius each time, keeping the coordinates of the sphere center of the particles fixed, keeping all the particles in the calendar area, and on the basis of the original particle radius, increasing the radius of each particle by the same length until the target porosity is reached, and outputting the porous medium target model. The method also includes sorting the plurality of target porosities from high to low, and constructing a next target model on the basis of the previous target model. The construction process of the method is controllable, the channel characteristics of the porous media with different porosities are associated, the construction process can be closer to the actual situation through specific parameter reflection, and the research on the porous media problem is facilitated.

Description

technical field [0001] The invention relates to the construction of porous media, in particular to a construction method of variable porosity porous media. Background technique [0002] Porous media is a typical complex three-dimensional structure with connected pores through which fluids can easily penetrate. Porous media problems are common in many industrial applications, such as low-permeability and special-permeability oil and gas field development, groundwater utilization, mining of gas beds, and preparation of metallic materials. In the study of groundwater pollution, the morphological characteristics of porous media channels in aquifers have an important impact on the flow of groundwater flow and the migration of pollutants, such as the phenomenon of preferential flow and the diffusion of pollutants between aquifers with different permeability. The microstructure of porous media leads to differences in macroscopic properties, such as porosity, pore channel morpholog...

Claims

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Application Information

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IPC IPC(8): G06T17/00
Inventor 窦智张学羿周志芳王锦国郭巧娜
Owner HOHAI UNIV
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