A numerical model of translational and rotational momentum transfer of small non-spherical rigid particles in fluid dominated two-phase flows

• Applicant: Professor Dr.-Ing. Paul Steinmann
• Subject Area: Mechanics ; Applied Mechanics, Statics and Dynamics ; Mechanical Process Engineering ; Fluid Mechanics
• Term: from 2014 to 2024
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 265898722

The main objective of the project is further development and advanced application of interaction models for numerical simulation of dilute dispersed two-phase flows by the Lagrange-Euler approach, developed in the Phase I. The first part is devoted to advanced validation of the novel shear-induced lift model by means of DNS as well as improvement of the Stokes drag force model on ellipsoids for the case of intermediate or high Knudsen number flow regime, that occurs in the case of micro particles. Furthermore, since advanced application of the developed models for the case of flows in narrow channels (the lung case) is one of the objectives, where interaction with the wall as well as regions with higher particle densities occur, the models for non-spherical particle interaction with the wall will be studied and extended to in-flow particle-particle collision of non-spherical particles. Finally, two complex problems of flows with dispersed non-spherical micro sized particles will be studied. The first is the case of numerical investigation of regional deposition of micro sized glass fibres in the human respiratory airway, and the second is the sedimentation of non-spherical porous particles with inhomogeneous mass distribution in a typical secondary wastewater clarifier.

• DFG Programme: Research Grants