Research Group of Prof. Dr. M. Griebel
Institute for Numerical Simulation
maximize

Dr. Alexander Rüttgers

Dr.  Alexander Rüttgers
Address: Institut für Numerische Simulation
Wegelerstr. 6
53115 Bonn
Germany
Office: We4 0.008
Phone: +49 228 733170
E-Mail: ruettger.ins.uni-bonn.de

Former member of the institute

Now at DLR: Simulations- und Softwaretechnik (http://www.dlr.de/sc/)

Research Projects

3D Benchmarks for Rising Bubbles
Cooperation with Dr. Sven Groß, IGPM, RWTH Aachen

Comparison of NaSt3DGPF, OpenFOAM and DROPS

Development of CFD Code NaSt3DGP

Completed Research Projects

TR 32: Transregional Collaborative Research Centre 32
Project D5: A high-resolution space-time model for precipitation combining remote sensing and in-situ measurements
DFG project
Speicherung und Transport von Öl in Borsten spezialisierter Bienen und in faserbasierten Strukturen: Strukturprinzipien, Wirkmechanismen, Numerische Simulation und technologische Umsetzung
Cooperation with Institut für Nutzpflanzenwissenschaften und Ressourcenschutz der Rheinischen Friedrich-Wilhelms-Universität Bonn, Institut für Textil- und Verfahrenstechnik Denkendorf
BMBF-Programm: BIONA - Bionische Innovationen für nachhaltige Produkte und Technologien
Entwicklung von umweltfreundlichen Trennverfahren für Ölemulsionen - Potentiale fuer oleodynamische technische Innovationen durch Transfer der Funktionen spezialisierter Insekten
Cooperation with Fa. Henkel KGaA Düsseldorf, Institut für Nutzpflanzenwissenschaften und Ressourcenschutz der Rheinischen Friedrich-Wilhelms-Universität Bonn, Institut für Textil- und Verfahrenstechnik Denkendorf

Teaching

Publications

[1] A. Rüttgers and M. Griebel. Multiscale simulation of polymeric fluids using the sparse grid combination technique. Applied Mathematics and Computation, 319:425-443, 2018. also available as INS Preprint No. 1623.
bib | http | .pdf 1 ]
[2] A. Rüttgers. Multiscale Simulation of Polymeric Fluids using Sparse Grids. Dissertation, Institut für Numerische Simulation, Universität Bonn, 2016.
bib | .pdf (link) ]
[3] A. Rüttgers, M. Griebel, L. Pastrik, H. Schmied, D. Wittmann, A. Scherrieble, A. Dinkelmann, and T. Stegmaier. Simulation of the oil storage process in the scopa of specialized bees. Computers & Fluids, 119:115-130, 2015. also available as INS Preprint No. 1404.
bib | http | .pdf 1 ]
[4] J. Adelsberger, P. Esser, M. Griebel, S. Groß, M. Klitz, and A. Rüttgers. 3D incompressible two-phase flow benchmark computations for rising droplets. 2014. Proceedings of the 11th World Congress on Computational Mechanics (WCCM XI), Barcelona, Spain, also available as INS Preprint No. 1401 and as IGPM Preprint No. 393.
bib | http | http | .pdf 1 ]
[5] M. Griebel and A. Rüttgers. Simulation of dilute polymeric fluids in a three-dimensional contraction using a multiscale FENE model. volume 1593 of AIP Conference Proceedings, pages 539-543, 2014. Proceedings of PPS-29: The 29th International Conference of the Polymer Processing Society, Nuremberg, Germany, also available as INS Preprint No. 1308.
bib | www: | .pdf 1 ]
[6] M. Griebel and A. Rüttgers. Multiscale simulations of three-dimensional viscoelastic flows in a square-square contraction. Journal of non-Newtonian Fluid Mechanics, 205:41-63, 2014. also available as INS Preprint No. 1313.
bib | http | .pdf 1 ]
[7] A. Rüttgers. Multiscale Modelling of Dilute Polymeric Fluids with Stochastic and Fokker-Planck-based Methods. Diplomarbeit, Institut für Numerische Simulation, Universität Bonn, 2010.
bib | .pdf 1 ]
[8] A. Rüttgers. Fehlerabschätzungen in der fast multipole method bei systemen mit periodischen randbedingungen. In M. Bolten, editor, Ergebnisse des Gaststudentenprogramms 2007 des John von Neumann-Instituts für Computing, Beiträge zum Wissenschaftlichen Rechnen, pages 107-121. Jülich Supercomputing Centre, 2007.
bib | http ]

Talks

Conference contributions

[1] Sparse grid combination technique for non-Newtonian fluids ,
ESCO2016 - 5th European Seminar on Computing, Pilsen, Czech Republic, June 5-10, 2016.
[2] 3D simulation of floral oil storage and transport by specialized insects ,
ParCFD2016 - 28th International Conference on Parallel Computational Fluid Dynamics , Kobe, Japan, May 9-12, 2016.
[3] Multiscale flow simulation of dilute polymeric fluids using bead-spring chains,
AERC 2015 - Annual European Rheology Conference, Nantes, France, April 14-17, 2015.
[4] 3D simulation of floral oil storage in the scopa of South American insects,
American Physical Society 67th Annual Fall DFD Meeting, San Francisco, California, USA, November 23-25, 2014.
[5] 3D incompressible two-phase flow benchmark computations for rising droplets,
WCCM XI - 11th World Congress on Computational Mechanics , Barcelona, Spain, July 20-25, 2014.
[6] 3D Simulation of Liquid Storage in the Feathers of Sandgrouses and in the Scopa of Specialized Insects,
ESCO 2014 - 4th European Seminar on Computing , Pilsen, Czech Republic, June 15-20, 2014.
[7] Simulation of the oil storage process in the scopa of specialized insects,
ParCFD - 26th International Conference on Parallel Computational Fluid Dynamics, Trondheim, Norway, May 20-22, 2014.
[8] 3D multiscale FENE dumbbell simulations on massively parallel multi-GPU clusters,
AERC 2014 - Annual European Rheology Conference 2014, Karlsruhe, Germany, April 8-11, 2014.
[9] Computationally challenging 3D multiscale FENE dumbbell simulations on multi-GPU systems,
Society of Rheology 85th Annual Meeting, Montreal, Canada, October 13-17, 2013.
[10] Simulation of dilute polymeric fluids in a three-dimensional contraction using a multiscale FENE model,
29th International Conference of the Polymer Processing Society, Nürnberg, Germany, July 15-19, 2013.
[11] Simulation of three-dimensional square-square contraction flows using a multiscale approach,
AERC13 - Annual European Rheology Conference 2013, Leuven, Belgium, April 2-5, 2013.
[12] Micro-Macro Simulation of Viscoelastic Fluids in Three Dimensions,
American Physical Society 65th Annual Fall DFD Meeting, San Diego, California, USA, November 18-20, 2012.
[13] Multiscale Simulation of dilute polymeric fluids by solving a high-dimensional Navier-Stokes-BCF system,
ECCOMAS 2012 - 6th EUROPEAN CONGRESS ON COMPUTATIONAL METHODS IN APPLIED SCIENCES AND ENGINEERING, Vienna, Austria, September 10-14, 2012.

Other Talks

[1] Multiscale Modelling of Dilute Polymeric Fluids with Stochastic and Fokker-Planck-based Methods,
Jülich Supercomputing Centre (JSC), Germany, November 10, 2010.
[2] Modelling of Dilute Polymeric Fluids with Stochastic and Fokker-Planck-based Methods,
Seminar Cardiff School of Mathematics, Cardiff , UK, May 11, 2010.

Research Stays

[1] Advanced Course: "Separated Representations & PGD Based Model Reduction: Fundamentals and Applications"
CISM: International Centre for Mechanical Sciences, Udine, Italy, July 8-12, 2013.
[2] 13th European School on Rheology
Laboratory of Applied Rheology and Polymer Processing, Leuven, Belgium, September 5-9, 2011.