Solid-liquid Multi-Pass filter tests are applied in particular to nonwoven filter media for filtration of transmission oils, hydraulic oils and fuels. The simulation of such filter processes on the pore-scale of the filter medium enables characterization and optimization of the nonwoven material for industrial applications.

Because of high drag forces, particles in solid-liquid filtration tend to have an adhesion probability < 1, so that the simulation of such filter processes on the pore-scale of the filter medium involves more detailed contact models and the necessity to determine particle-particle and particle-structure adhesion forces. Correspondingly, in preceding work with DNSlab®, a suitable 1½-way CFD-DEM coupling approach was developed [Puderbach2021, Schmidt2022, Puderbach2024].

This contribution shows an application of the developed simulation method to model ISO 16889 Multi-Pass testing of the BinNova AH0022 nonwoven with ISO 12103-1 A3 Medium Dust particles and UNIVIS HVI 13 oil with 13.5 mm²/s viscosity at 40°C.