GeoDict User Guide 2025

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Navigation: GeoDict 2025 - User Guide > Simulation & Prediction > FilterDict

Filter Media

At the Filter Media scale, simulate the filtration process on a micro-scale 3D structure model. Micro-scale 3D structure models resolve every fiber or grain of the filter material. You may generate them with GeoDict’s structure generation modules, or import and segment 3D-image data with ImportGeo-Vol.

You can select two types of simulations from the pull-down menu below Filter Media: Filter Efficiency and Filter Lifetime.

Commands available for filter media analysis
Filter Efficiency Determine the initial efficiency of the filter and calculate the most penetrating particle size. Filter Lifetime A Filter Lifetime simulation includes clogging of the filter and computes pressure drop and deposited dust over time. In a Single Pass simulation, fluids pass through the filter only once and are not recirculated. In a Multi Pass simulation, fluids move in a circuit through the system, and particle size distribution and concentration in front of the filter change over time.

Commands available for filter media analysis

Filter Efficiency
Determine the initial efficiency of the filter and calculate the most penetrating particle size.
Filter Lifetime
A Filter Lifetime simulation includes clogging of the filter and computes pressure drop and deposited dust over time. In a Single Pass simulation, fluids pass through the filter only once and are not recirculated. In a Multi Pass simulation, fluids move in a circuit through the system, and particle size distribution and concentration in front of the filter change over time.

Note-Info

Note! For all Filter Media simulations, it is essential that the structure model contains enough free space as inflow region (Z- direction) and outflow region (Z+ direction).

For efficiency simulations, the inflow region should be larger than the largest particle diameter. For filter lifetime simulations, the inflow region should be larger than the largest particle diameter plus the expected height of the filter cake.

The outflow region should be long enough for the flow to adjust to the boundary conditions. For faster flows, larger outflow regions are required.

To add inflow and outflow regions, use the ProcessGeo-Embed command. Enter the appropriate number of voxels, in the Z- and Z+ boxes, and click Embed. Then, switch back to FilterDict.

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GeoDict User Guide 2025

Filter Media