DCM plugin for partially percolating LBM single phase flow

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

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