## Christoph Rettinger, M.Sc.(hons)

### 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

### 2020

**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

**waLBerla: A General Purpose Software Framework for Massively Parallel Simulations**

SIAM Conference on Computational Science and Engineering (Spokane, 25. February 2019 - 1. March 2019)
:**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)
, :**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
, :**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

**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)
:**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)
:**Large-Scale Lattice Boltzmann Simulations of Particulate Flows**

SIAM Conference on Parallel Processing for Scientific Computing (Tokyo, 7. March 2018 - 10. March 2018)
:**Large-Scale Lattice Boltzmann Simulations of Sedimentary Flows**

12th European Fluid Mechanics Conference (Wien, 9. September 2018 - 13. September 2018)
:**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

**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)
:**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)
:**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
, , , , , , :**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

**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)
:**Simulations of Particle-laden Flows with the Lattice Boltzmann Method**

GAMM Annual Meeting (Braunschweig, 7. March 2016 - 11. March 2016)
:**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
, :