Plugin of PP-LBM-SS

The plugin is an implementation of the partially percolating lattice Boltzmann model (PP-LBM) with locally varying voxel effective percolating fraction.

It has been used to simulate flow and determine permeability of two real-world rock samples as published in a Phys Rev E paper by Li et al (2014).

The effective percolating fractions of voxels were estimated using the DCM software (Yang et al, CSIRO Data-Access Portal - https://data.csiro.au/dap/landingpage?pid=csiro:9448) generated volume fractions.

- The plugin requires voxel-based percolation fraction, plus other parameters as the following:
+ Effective percolation fraction channel index
+ Fluid speed channel index
+ Maximum iterations for computation
+ Display interval
+ Voxel physical size in microns

- The plugin can estimate the effective percolation fraction using void and calcite volume fractions as detailed in the Phys Rev E paper. The input parameters are the following:
+ Void volume fraction channel index
+ Calcite volume fractions channel index
+ Fluid speed channel index
+ Maximum iterations for computation
+ Display interval
+ Volume fraction of Calcite
+ Voxel physical size in microns

本插件为局部体素有效渗流占比可变的部分渗流格子玻尔兹曼模型（Partially Percolating Lattice Boltzmann Model, PP-LBM）的实现。
该插件已被应用于流体流动模拟，并可用于测定两块实际岩石样本的渗透率，相关研究成果发表于Li等人2014年刊载于《物理评论E辑》（Phys Rev E）的学术论文中。
体素的有效渗流占比可通过DCM软件（Yang等，CSIRO数据访问门户——https://data.csiro.au/dap/landingpage?pid=csiro:9448）生成的体积占比数据估算得到。

当已获取基于体素的渗流占比时，本插件需输入该占比以及以下其余参数：
+ 有效渗流占比通道索引
+ 流体速度通道索引
+ 计算最大迭代次数
+ 显示间隔
+ 体素物理尺寸（单位：微米）

此外，本插件可依据《物理评论E辑》论文中详述的方法，利用孔隙体积占比与方解石体积占比估算有效渗流占比，此时所需输入参数如下：
+ 孔隙体积占比通道索引
+ 方解石体积占比通道索引
+ 流体速度通道索引
+ 计算最大迭代次数
+ 显示间隔
+ 方解石体积占比
+ 体素物理尺寸（单位：微米）