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GeoDict User Guide 2025

Report

The Report tab under the Results tab shows the computed results depending on the selected flow experiment set-up.

It starts with the Permeability (3x3) tensor. Below the Permeability tensor the Error Bound tensor (or Tolerance tensor) is located. This special tensor indicates the accuracy of the off-diagonal permeability entries. If the color code in the table is yellow or red, it might be a good idea to repeat the simulation and consider the Flow & tangential permeability in the stopping criterion.

Below a report providing the flow simulation results is located. In the reports for the selected computation directions, for example, find values for Average flow velocity at a given pressure drop (or Pressure Drop at a given mean flow velocity), Flow Resistivity, Gurley value, and the estimated Reynolds number.

Information about the convergence of the iterative solver is also displayed for each selected computation direction: iterations, runtime, memory usage, and applied stopping criterion.

In the last line the total runtime and total memory usage are given. Here not only the resources used by the solver are taken into account but also writing volume fields and structure files or already loaded volume fields from previous simulations. Thus, even if only one flow direction is computed, the total runtime and total memory values are usually higher than the solver specific values.

Post-Processing

For user post-processing, several parameters in the result file can be changed.

Note-Important

Important! Note that after clicking Apply, the result file changes and is not the original simulation result file anymore! If Back-up result file is checked, the original *.gdr file is saved in the result folder and can be restored at any time.

The value of the physical Media Thickness in X-, Y-, and Z-direction can be changed in the post-processing settings section on the left. The Media Thickness corresponds to the symbol L in the description of permeability.

When the user enters different values for the media thickness and clicks Apply, the permeability, Reynolds number and flow resistivity in the Results-Report and the Results-Map are changed according to the new length for each direction.

Another post-processing option is the Permeability Unit which can be changed to m2, mDarcy, or Darcy. When the user changes the unit and clicks Apply, the permeability tensor is converted to the new unit.

Additionally, the Flow Rate Unit can be changed to m3/s, l/s, l/min, m3/h, or cfm.

For Characteristic Length four possibilities can be chosen: Numerical Length, Max. Pore Diameter, Max. Fiber/Particle Diameter, and Manually specified. If Manually specified is selected, a characteristic length has to be specified below. You can find further information on the Characteristic Length here.

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