5.2.2. Create Model

Here, the code blk3cell.exe and the input file blk3cell.inp (see format) are used to create a conductivity model on the underlying tensor mesh. Then, the code 3DModel2Octree.exe and the input file 3Dmodel2octree.inp (see format) are used to interpolate the tensor mesh onto the OcTree mesh. For this example, we use the mesh that was created in the example “create OcTree mesh”. Files relevant to this part of the example are in the sub-folder octree_model. Before running this example, you may want to do the following:

• Download and open the zip folder containing the entire E3DMT version 1 example (if not done already)

• Learn how to run blk3cell and 3DModel2Octree from command line

• Learn the format of the input files blk3cell.inp and 3Dmodel2octree.inp

Here is the input file for blk3cell.exe

Warning

It is not advisable to image models on the base tensor mesh as they can be prohibitively large (>> 1M cells).

Here is the input file for 3DModel2Octree.exe

The resulting Octree model shows an L-shaped conductor (\(\sigma\) = 1 S/m) within a resistive background (\(\sigma_b\) = 0.01 S/m).