21. Multiphase granular suspension flow during pumping in complex geometries – FLOWcomplex
Principal investigator(s) – PI
- Prof. Dr.-Ing. habil. Rüdiger Schwarze
TU Bergakademie Freiberg, Institut für Mechanik und Fluiddynamik - Prof. Dr.-Ing. Viktor Mechtcherine
TU Dresden, Institut für Baustoffe
Researcher(s) in-charge – RI
- Dipl.-Ing. Daniil Mikhalev
TU Dresden, Institut für Baustoffe Dr.- Ing. Lisa Fritzsche
TU Bergakademie Freiberg, Institut für Mechanik und Fluiddynamik
Former members
- Dr.- Ing. Martin Haustein
TU Bergakademie Freiberg, Institut für Mechanik und Fluiddynamik
Associated researcher – AR
- Dipl.-Chem. Dr.rer.nat. Christof Schröfl
TU Dresden, Institut für Baustoffe - Dipl.-Ing. Moritz N. Kluwe
TU Bergakademie Freiberg, Institut für Mechanik und Fluiddynamik
Subject Areas
Construction Material Sciences, Chemistry, Building Physics
Term
Since 2021
Project identifier
Deutsche Forschungsgemeinschaft (DFG) – Projektnummer 387065607
Project Description
In this project, the formation and the rheology of the lubrication layer during concrete pumping is investigated. Special attention is paid to the pulsating nature of the pumping process. For this purpose, the mesoscale two-phase flow field consisting of cement and coarser grains (sand and agglomerates) is modelled in an experiment and in numerical simulations. Details of the two individual phases (cement and coarse grains) are resolved separately in the two-phase flow especially near to pipe walls. Here, the focus is on particle migration and segregation during the permanently changing acceleration and deceleration periods of the two-phase flow. Flow rules for the two-phase flow in the lubrication layer are formulated with respect to the researched correlations between the individual mesoscale parameters of cement and coarser grains in the two-phase flow field.
