Tough2-FLAC 3D

Floriane Youzan As stated by Christine, there is no way to convert a TOUGH mesh to a FLAC3D grid since we are lacking the cell connectivity data required to reconstruct the original cells (TOUGH MESH file only stores the cell centers although they are not used during the simulation). Using Antonio Rinaldi's Matlab scripts won't help either since it only converts a FLAC3D grid to a TOUGH MESH file. As far as I know, people who work with TOUGH-FLAC at LBL are now using Laura Blanco-Martin's Fortran MESH_FLAC2TOUGH program for the FLAC3D grid to TOUGH mesh conversion.

That being said, I have developed a Python library for all I/O processing for TOUGH (https://github.com/keurfonluu/toughio). It can read FLAC3D grid files *.f3grid (among other formats) and smoothly write the corresponding TOUGH MESH file.

import toughio

mesh = toughio.read_mesh("mesh.f3grid")
mesh.write_tough()

Floriane Youzan Yes, if you have a Python distribution installed (the most popular being Anaconda), you can simply run in Windows console the following command line to install the package:

pip install toughio[full] --user

Floriane Youzan No, it's the .f3grid file that you can export from FLAC3D (File > Grid > Export to FLAC3D). It will export all the information from your grid as a text file (by default).

Floriane Youzan Can you provide the export .f3grid file for debugging purpose?

Floriane Youzan Your mesh is flat, is it expected? TOUGH is a integral finite-volume simulator, so you need a 3D mesh (FLAC3D too, as far as I know).

Edit: the z-component of your grid points are all equal to 6, that's why your mesh is flat.

Floriane Youzan Can you provide a screenshot of the grid in FLAC3D?

The .f3grid file you provided has all the z-components of the grid points equal to 6 (you can open it with notepad).

Floriane Youzan 

I got this file with your command:

zone create brick size 38,27,6

I am using a more recent version of FLAC3D, though. Can you update to the latest version (https://www.itascacg.com/software/downloads/flac3d-7-00-update)? Itasca may have fixed the bug.

Floriane Youzan It does not return any variable. It creates a MESH file in your current working directory.

Floriane Youzan You are not using the latest release of FLAC3D7. According to the .f3grid file you provided, you are using FLAC3D7 R091 while the latest is R118.

Floriane Youzan There are 6156 elements in your grid, the CONNE block starts at line 6159 of the MESH file.