Particle Micromechanics
Particle-wall and particle-particle collisions occur in many different granular processes, like fluidized bed, filtration, milling and hydraulic and pneumatic conveying. During the contact, many different micro processes, such as plastic deformation, adhesion, friction and breakage, are dependent on the particle’s properties. The Institute of Particle Process Engineering focuses on the determination of the micromechanical properties of particles and agglomerates. The particle micromechanics are investigated with compression tests, nanoindentation, tribology measurements and collision tests to describe the particle micromechanics. Additionally, simulations using the discrete element method are performed with experimental calibrated contact models to understand and predict the behavior of particles and agglomerates.
Within the collaborative research center 926 (MICOS, subproject A08), the dynamic particle-wall interactions are investigated depending on the surface morphology and liquid layers with single particle collision tests. The influence of vibration on the flow behavior of granular pastes, such as gypsum and fresh concrete, is investigated experimentally and numerically in cooperation with our partners at the University of Nancy (France). The obtained results can be used for the optimization of the transport behavior of the pastes.
Team
Contact: M.Sc. Fabian Krull
Research projects






DFG-Großgerät Computertomograf
December 3, 2021
Contact: Phlipp Grohn
Funding: DFG
DFG-ANR collaboration project „PASTFLOW“: Spreading of granular pastes: from the particle to end use properties
March 3, 2021
Contact: Fabian Krull
Funding: DFG
Strukturierung von Bauteiloberflächen durch Aufbringung feindisperser Partikeln
August 1, 2021
Contact: Mustafa Bozoglu
Funding: DFG - B03 im SFB 926 Bauteiloberflächen: "Morphologie auf der Mikro-Skala"
CRC 926 subproject A08: Dynamic interactions of particles with wetted structured component surfaces
February 20, 2020
Contact: David Strohner
Funding: DFG - A08 within CRC 926 - funding period 3
Analysis of fluidization and shear conditions in rotor fluidized beds in dry and wet condition
August 20, 2019
Contact: Phlipp Grohn
Funding: DFG
Transport, Lagerung und Formgebung industriell relevanter Partikelsysteme: Interreg Projekt "PowderReg"
January 1, 2017
Contact: Robert Hesse
Funding: Europäischer Strukturfonds zur regionalen Entwicklung (EFRE)
Completed Research Projects



Beschreibung der Mechanismen in der Herstellung kugelförmiger Granulatpartikel durch Sphäronisation
December 31, 2018
Contact: Dominik Weis
Funding: DFG
Modellierung der Partikelhaftung und Reibung
June 30, 2015
Contact: Jürgen Hartmüller
Förderung: DFG - SFB 926
Dynamische Wechselwirkungen von Partikeln und Tropfen mit strukturierten Bauteiloberflächen
June 1, 2015
Contact: Fabian Krull
Funding: DFG - A08 in SFB 926 - Förderperiode 2
Recent Publications
- Hesse, R., Krull, F., Antonyuk, S.: Prediction of random packing density and flowability for non-spherical particles by deep convolutional neural networks and Discrete Element Method simulations, Powder Technology 393 (2021), https://doi.org/10.1016/j.powtec.2021.07.056
- Hesse, R., Krull, F., Antonyuk, S.: Experimentally calibrated CFD-DEM study of air impairment during powder discharge for varying hopper configurations, Powder Technology (2020), https://doi.org/10.1016/j.powtec.2020.05.113
- Deshpande, R., Antonyuk, S., Iliev, O.: DEM-CFD study of the filter cake formation process formed due to non-spherical particles, Particuology (2020), https://doi.org/10.1016/j.partic.2020.01.003
- Grohn, P., Weis, D., Thommes, M., Heinrich, S., and S. Antonyuk, Contact behavior of MCC pellets depending on their water content, Chem. Eng. Technol. (2020), https://doi.org/10.1002/ceat.201900517
- Breuninger, P., Krull, F., Huttenlochner, K., Müller-Reno, C., Ziegler, C., Merz, R., Kopnarski, M., Antonyuk, S.: Microstructuring of steel surfaces via cold spraying with 316L particles for studying the particle-wall collision behavior, Surface and Coatings Technology 379 (2019) 125054, https://doi.org/10.1016/j.surfcoat.2019.125054
- Weis, D., Krull, F., Mathy, J., Evers, M., Thommes, M., Antonyuk, S.: A contact model for the deformation behaviour of pharmaceutical pellets under cyclic loading, Advanced Powder Technology 30 (2019) 2492-2502, https://doi.org/10.1016/j.apt.2019.07.026
- Deshpande, R., Antonyuk, S., Iliev, O.: Study of the filter cake formed due to the sedimentation of mono and bi-dispersed particles using DEM-CFD simulations, AIChE Journal 65, (2019) 4, 1294-1303 https://doi.org/10.1002/aic.16529
- P. Breuninger, F. Krull, K. Huttenlochner, C. Müller-Reno, C. Ziegler, R. Merz, M. Kopnarski, S. Antonyuk: Microstructuring of steel surfaces via cold spraying with 316L particles for studying the particle-wall collision behavior, Surface and Coatings Technology (2019), Available online 08.10.2019, https://doi.org/10.1016/j.surfcoat.2019.125054
- F. Krull, R. Hesse, P. Breuninger, S. Antonyuk: Impact behaviour of microparticles with microstructured surfaces: Experimental study and DEM simulation, Chemical Engineering Research and Design 135 ( 2018), 175-184, https://doi.org/10.1016/j.cherd.2018.05.033
- P. Breuninger, D. Weis, I. Behrendt, P. Grohn, F. Krull, S. Antonyuk: CFD-DEM simulation of fine particles in a spouted bed apparatus with a Wurster tube, Particuology 42 (2019), 114-125, https://doi.org/10.1016/j.partic.2018.03.015
- F. Krull, P. Breuninger, S. Antonyuk. "Dynamic interactions of polystyrene particles with microstructured surface manufactured by cold spray." EPJ Web of Conferences. Vol. 140. EDP Sciences 140 (2017), https://doi.org/10.1051/epjconf/201714013011
Laboratory Equipment (selected):
Single particle collision setup
In house developed setup for the 3D investigation of single microparticle-wall collisions in various fluids
Texture Analyzer
Particle compression and tensile tests up to 500 N, friction measurement
Single particle collision setup
Measurement of adhesion, friction, attrition and mechanical properties of particles and substrates, SPM-Imaging
Materials testing machine (Zwick/Roell)
Tensile and compression tests of materials up to 10 kN
High frequency vibration table
Measurement of particle van der Waals’ forces and capillary forces
High velocity impact chamber
In-house developed measuring chamber for observing particle trajectories, impact phenomena and fracture behavior
Simulation Tools
- DEM simulations with multipshere method
- Coupled CFD-DEM
- FEM