Simulation of filtration processes in deformable media: Part 3.2: Interaction modelling and verification of a non-spherical dirt particle solver

A Lagrangian solver to realistically model large, non-spherical dirt particles and their behavior in the vicinity of deformable filtration fibres has been programmed. While this paper focuses on the realization of interaction effects and result verification, a related article, concerning basic solver concepts as well as drag force implementations, has been published, [3]. A digitally reconstructed, deformable filter fibre structure gives the framework for all particle interactions with their surroundings. Particle-fibre deposition effects, are being modelled in detail. Fibre forces, that act on a particle and confine it, can be applied on a user-defined basis. The collision module handles particle-particle interactions, detects exact particle-surface impact locations and calculates translational- as well as rotational collision effects. In order to validate Computational Fluid Dynamics results, like filter fibre efficiency and particle penetration depth, a semi-analytical verification approach for simplified fibre geometries has been devised. In addition to that, extensive, experimental test runs are currently conducted.