Digital Tool: Deposition of particles on the microscale
Background:
When analysing filters on the component scale, the resistance characteristic, i.e. the increase in pressure when the filter is loaded, is an important input variable. This can only be determined by a detailed analysis on the microscale.
Target variables:
Determination of the resistance or the pressure-
Challenges:
Complex workflow with flow and particle simulation on different grids (Chimera approach) and topology change due to deposited particles (grid adaptation). The entire simulation can therefore only be carried out efficiently in an automated process.
Solution approach:
- Creation of an automated process with initial flow calculation, particle transport, deposition, grid adaptation, renewed steady-
state flow simulation and subsequent particle transport until the total mass of particles to be considered is introduced. - Validation of the model: comparison of the resulting pressure-
flow curve with a monodisperse bed (Carman- Kozeny equation) - Automation of the process with pure OpenFOAM functionality with snappyHexMesh as meshing tool and stl input for the deposition elements
- Automation of the extraction of the results from the simulation
- Integration of the model into the cloud
Model validation: calculation of the pressure loss at the monodisperse packing with different methods