Temperature

The Temperature for the filtration process is selectable in Kelvin (K), Celsius (°C), and Fahrenheit (°F). The chosen temperature may change the density and viscosity values of the fluid during the simulation, if those are defined to be temperature-dependent in the material database. Furthermore, if the Brownian motion of the particles is included in the simulation, it determines the strength of the Brownian motion through equation (215) .  

Fluid Density and Viscosity

FilterDict uses single-phase flow simulations. It is not possible to run a flow simulation if two fluids are present in the structure. If multiple fluids are present in the structure, you may click Set all Fluids to… and select one fluid for the simulation.

The selected fluid is also displayed in the drop-down menu in the Material subtab behind Use. The density and the dynamic viscosity of this fluid are shown under the Fluid Density/Viscosity subtab.

If a fluid from the GeoDict Material Database is used, the values for Density and Dynamic Viscosity are taken from the database and may depend on the given Temperature value. Select Manual as fluid material to enter parameter values manually.

To add materials to the database, use the Open & Edit Material Database button. More information on editing, expanding, and using the GeoDict Material Database is available in the Material Database user guide.

Filter Media Permeability

Under the Permeability subtab, enter the permeability of porous materials present in the structure. As long as there are only fluid and solid materials present in the structure, no parameters are needed here:

For porous materials, choose if the material is Isotropic or Anisotropic. In the isotropic case, the permeability is the same in all space directions. In the anisotropic case, enter a different permeability for each spacial direction.

You can select and change a material by clicking on the material button.