TOUGH2Viewer is a Java program capable of displaying unstructured (Voronoi complying) grids, locally refined and structured grids (complying with the MESHMAKER iTOUGH2 format).
In particular, TOUGH2Viewer allows to navigate through a 3D grid compatible with the iTOUGH2 data file format and see:
(1) the thermodynamic variables and the material (namely, petrophysical properties) of each block;
(2) maps of isovalues (2D) of all thermodynamic variables;
(3) isosurfaces (3D) of all thermodynamic variables;
(4) flows of mass and heat between blocks;
(5) spatial profiles of thermodynamic variables, of a selected set of blocks, long a Cartesian directions;
(6) time plot of thermodynamic variables of a selected block.
All commands to manage a 3D visualization (zooming, pan, rotations) are CAD complying