Christoph Rettinger
Dr.-Ing. Christoph Rettinger, M.Sc.(hons)
Department of Computer Science
Chair of Computer Science 10 (System Simulation)
waLBerla
- I am involved in the development and validation of the multi-physics software waLBerla. Its aim is to provide a flexible framework for CFD simulations and beyond that efficiently makes use of current and future supercomputers.
- My special focus there is on particulate flows, i.e. the description of particle-fluid interactions. Applications are the sediment transport in river beds or fluidized bed reactors.
Teaching
- I lead the exercises for the courses “Simulation and Scientific Computing 1” and “Simulation and Scientific Computing 2”, which are one of the key lectures in the Computational Engineering program.
- Formerly, I was the tutor for the course “Numerical Simulation of Fluids”. Therein, the students got to know the concepts of CFD and apply a suitable discretization method to finally come up with a self-implemented fluid flow simulator.
Available Theses
- Topics upon consultation. Contact me if you are interested in CFD simulations.
Finished Theses
- M. Rippl, Computational Analysis of Particle Migration in a Square Micro Channel, Master Thesis, 2016
C. Rettinger, M. Avila (LSTM, FAU) - D. Schuster, Direct Numerical Simulations of Fluidized Beds with the Lattice Boltzmann Method, Master Thesis, 2017
C. Rettinger, U. Rüde, V. Buwa (IIT Delhi) - S. Valencia, Direct Numerical Simulation of Particle Agglomeration with the Lattice Boltzmann Method, Master Thesis, 2018
C. Rettinger, U. Rüde - D. Ribica, Code Generation vs. HPC Framework, Bachelor Thesis, 2018
S. Kuckuk, C. Rettinger, H. Köstler - J. Wendler, Predicting Particle-Fluid Drag Forces Using Deep Neural Networks, Bachelor Thesis, 2018
C. Rettinger, H. Köstler - N. Krieg, Numerical Study of Grid Refinement Techniques for the Lattice-Boltzmann Method, Bachelor Thesis, 2019
C. Rettinger, U. Rüde - M. König, Combining Fully Resolved and Unresolved Coupling Methods for Strongly Heterogeneous Sized Particulate Flow Simulations, Bachelor Thesis, 2020
C. Rettinger, U. Rüde - L. Werner, Simulating the Motion of Very Light Particles in Fluids with an Adaptively Refined Lattice Boltzmann Method, Master Thesis, 2020
C. Rettinger, U. Rüde
2025
- Kemmler S., Rettinger C., Rüde U., Cuéllar P., Köstler H.:
Efficiency and scalability of fully-resolved fluid-particle simulations on heterogeneous CPU-GPU architectures
In: International Journal of High Performance Computing Applications (2025)
ISSN: 1094-3420
DOI: 10.1177/10943420241313385
2023
- Kemmler S., Schwarzmeier C., Rettinger C., Plewinski J., Núñez-González F., Köstler H., Rüde U., Vowinckel B.:
Geometrically Resolved Simulation of Upstream Migrating Antidune Formation and Propagation
40th IAHR World Congres (Wien, 21. August 2023 - 25. August 2023) - Schwarzmeier C., Rettinger C., Kemmler S., Plewinski J., Núñez-González F., Köstler H., Rüde U., Vowinckel B.:
Particle-resolved simulation of antidunes in free-surface flows
In: Journal of Fluid Mechanics 961 (2023), p. R1
ISSN: 0022-1120
DOI: 10.1017/jfm.2023.262 - Schwarzmeier C., Rettinger C., Kemmler S., Plewinski J., Núñez-González F., Köstler H., Rüde U., Vowinckel B.:
Particle-resolved simulations of antidune migration in supercritical flows
EGU General Assembly (Wien, 23. April 2023 - 28. April 2023)
URL: https://www10.cs.fau.de/publications/posters/2023/Kemmler_EGU_2023.pdf
2022
- Rettinger C., Eibl S., Rüde U., Konidena S., Vowinckel B.:
Comparative Study of the Rheological Behavior of Sheared Bi- and Polydisperse Sediment Beds via Fully Resolved Simulations
39th IAHR World Congress (Granada, 19. June 2022 - 24. June 2022)
DOI: 10.3850/IAHR-39WC25217119202253 - Rettinger C., Eibl S., Rüde U., Vowinckel B.:
Rheology of mobile sediment beds in laminar shear flow: effects of creep and polydispersity
In: Journal of Fluid Mechanics 932 (2022), p. A1
ISSN: 0022-1120
DOI: 10.1017/jfm.2021.870 - Rettinger C., Rüde U.:
An efficient four-way coupled lattice Boltzmann – discrete element method for fully resolved simulations of particle-laden flows
In: Journal of Computational Physics 453 (2022), Article No.: 110942
ISSN: 0021-9991
DOI: 10.1016/j.jcp.2022.110942
URL: https://www.sciencedirect.com/science/article/pii/S0021999122000043 - Rettinger C., Rüde U., Vollmer S., Frings RM.:
Effect of sediment form and form distribution on porosity: a simulation study based on the discrete element method
In: Granular Matter (2022), Article No.: 118
ISSN: 1434-7636
DOI: 10.1007/s10035-022-01275-x
2021
- Rettinger C., Eibl S., Rüde U., Vowinckel B.:
Numerical study of sheared mobile polydisperse sediment beds with a coupled lattice Boltzmann-discrete element method
EGU General Assembly (, 19. April 2021 - 30. September 2021)
DOI: 10.5194/egusphere-egu21-1464 - Rettinger C., Frings R., Rüde U., Vollmer S.:
The influence of size and shape on the porosity of fluvial sediment deposits - a numerical study
PARTICLES Conference 2021 (Hamburg, 4. October 2021 - 5. October 2021) - Werner L., Rettinger C., Rüde U.:
Coupling fully resolved light particles with the lattice Boltzmann method on adaptively refined grids
In: International Journal For Numerical Methods in Fluids (2021)
ISSN: 0271-2091
DOI: 10.1002/fld.5034
2020
- Bauer M., Eibl S., Godenschwager C., Kohl N., Kuron M., Rettinger C., Schornbaum F., Schwarzmeier C., Thönnes D., Köstler H., Rüde U.:
WALBERLA: A block-structured high-performance framework for multiphysics simulations
In: Computers & Mathematics with Applications (2020)
ISSN: 0898-1221
DOI: 10.1016/j.camwa.2020.01.007
2019
- Rettinger C.:
waLBerla: A General Purpose Software Framework for Massively Parallel Simulations
SIAM Conference on Computational Science and Engineering (Spokane, 25. February 2019 - 1. March 2019) - Rettinger C., Rüde U.:
Accurate Particulate Flow Simulations with a Coupled Lattice Boltzmann – Discrete Element Method
16th International Conference for Mesoscopic Methods in Engineering and Science (Edinburgh, 22. July 2019 - 26. July 2019) - Rettinger C., Rüde U.:
Dynamic Load Balancing Techniques for Particulate Flow Simulations
In: Computation 7 (2019)
ISSN: 2079-3197
DOI: 10.3390/computation7010009
URL: https://www.mdpi.com/2079-3197/7/1/9 - Rettinger C., Vowinckel B., Rüde U.:
Grain-resolved simulations of particle-laden flows with a coupled lattice Boltzmann – discrete element method
VI International Conference on Particle-Based Methods (Barcelona, Spanien, 28. October 2019 - 30. October 2019)
2018
- Rettinger C.:
Adaptive Grid Refinement Techniques for Particulate Flow Simulations with the Lattice Boltzmann Method
Platform for Advanced Scientific Computing (PASC) Conference (Basel, 2. July 2018 - 4. July 2018) - Rettinger C.:
Adaptive Mesh Refinement and Load Balancing Techniques for Particulate Flow Simulations
CoSaS - International Symposium on Computational Science at Scale (Erlangen, 5. September 2018 - 7. September 2018) - Rettinger C.:
Large-Scale Lattice Boltzmann Simulations of Particulate Flows
SIAM Conference on Parallel Processing for Scientific Computing (Tokyo, 7. March 2018 - 10. March 2018) - Rettinger C.:
Large-Scale Lattice Boltzmann Simulations of Sedimentary Flows
12th European Fluid Mechanics Conference (Wien, 9. September 2018 - 13. September 2018) - Rettinger C., Rüde U.:
A coupled lattice Boltzmann method and discrete element method for discrete particle simulations of particulate flows
In: Computers & Fluids (2018), p. 706-719
ISSN: 0045-7930
DOI: 10.1016/j.compfluid.2018.01.023
2017
- Rettinger C.:
Discrete Particle Simulation of Particulate Flows with the Lattice Boltzmann Method
26th International Conference on Discrete Simulation of Fluid Dynamics (Erlangen, 10. July 2017 - 14. July 2017) - Rettinger C.:
Massively Parallel Lattice Boltzmann Simulations of Fully Resolved Particulate Flows
VII International Conference on Coupled Problems in Science and Engineering (Rhodes Island, 12. June 2017 - 14. June 2017) - Rettinger C., Godenschwager C., Eibl S., Preclik T., Schruff T., Frings RM., Rüde U.:
Fully Resolved Simulations of Dune Formation in Riverbeds
In: Kunkel JM, Yokota R, Balaji P, Keyes D (ed.): High Performance Computing: 32nd International Conference, ISC High Performance 2017, Frankfurt, Germany, June 18-22, 2017, Proceedings, Cham: Springer International Publishing, 2017, p. 3-21
ISBN: 978-3-319-58667-0
DOI: 10.1007/978-3-319-58667-0_1 - Rettinger C., Rüde U.:
A comparative study of fluid-particle coupling methods for fully resolved lattice Boltzmann simulations
In: Computers & Fluids (2017), p. 74-89
ISSN: 0045-7930
DOI: 10.1016/j.compfluid.2017.05.033
URL: http://www.sciencedirect.com/science/article/pii/S0045793017302086
2016
- Rettinger C.:
Comparative study of coupling methods for direct numerical simulations of particulate flows with the lattice Boltzmann method
13th International Conference for Mesoscopic Methods in Engineering and Science (Hamburg, 18. July 2016 - 22. July 2016) - Rettinger C.:
Simulations of Particle-laden Flows with the Lattice Boltzmann Method
GAMM Annual Meeting (Braunschweig, 7. March 2016 - 11. March 2016) - Rettinger C., Rüde U.:
Simulations of Particle-laden Flows with the Lattice Boltzmann Methods
In: Proceedings in Applied Mathematics and Mechanics 16 (2016), p. 607-608
ISSN: 1617-7061
DOI: 10.1002/pamm.201610292
URL: http://onlinelibrary.wiley.com/doi/10.1002/pamm.201610292/epdf
2014
- Baloglu MV., Nadjafabadi Farahani MH., Rettinger C., Vogel C.:
Unconventional Discretisations of the Temperature Equation in Earth Mantle Dynamics
(2014)
URL: https://www10.cs.fau.de/publications/reports/2014_BalogluFarahaniRettingerVogel-BGCE.pdf
(Techreport)