Simulate Flow
Continue with the Simulate Flow step after you have done the Pre-Processing step. Alternatively, you can load the CompleteFilterWithInletAndOutlet.gdt file from the Results-M2M folder and skip the previous Pre-Processing step. |
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Experimental setup and material parameters We use oil with a density of 839.4 kg/m³ and viscosity of 0.04998 kg/(m s). The oil passes through the pleated filter with a flow rate of 4 l/min. The filter has a surface area of about 280 cm², so the average superficial flow velocity in the filter media is therefore ~2.4 mm/s. Thus, flow in the filter media is slow and laminar and governed by Darcy's law. The filter media itself has a permeability of 4.96 e-11 m². |
- To run the flow simulation, go to the FlowDict module and choose Simulate Flow Experiment. Click Edit… to change the input parameters of the simulation. In the solver dialog, change the result file name to CompleteFilterFlowSimulation.gdr.
- On the Constituent Materials tab, you need to set the flow properties of the unresolved filter material. For this, click on the Permeability tab and enter an isotropic permeability of 4.96e-11 m² for material ID 05.
The other material parameters needed for the flow simulation, i.e., the density and viscosity of the fluid, are taken from GeoDict's material database. - In the Flow Experiment tab, the inlet material ID 06 and the outlet material ID 07 are already automatically recognized, as we had entered "Inlet" and "Outlet" as material information during the preprocessing steps.
As boundary condition on the inlet, choose a Flow Rate of 4 l/min. For this flow rate, it is possible to change the Flow Motion to Creeping Flow (Stokes-Brinkman). On the outlet, set a pressure of 1 bar.
Check that No-slip is selected as Domain Boundary Conditions.
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Know how! If you are unsure if the Flow Motion is Creeping Flow or Fast Flow, select Fast Flow (the default). The Fast Flow model solves the Navier-Stokes equations and will deliver a physically correct results also for slow, creeping flows. Computation of the result will take much longer, though, than solving the simplified Stokes equation. |
- Keep the default values for all settings on the Solver tab.
- Click OK to save the entered parameters and close the dialog.
- To start the flow simulation, click Run in the FlowDict section. After the simulation has finished (which takes some minutes depending on the system and process number), the Result Viewer of the .gdr result file appears automatically. On the Report tab, you can find the computed pressure drop.
