Dipl. Math. Roberto Croce

Address:	Institut für Numerische Simulation Wegelerstr. 6 53115 Bonn Germany
Office:	We4 0.017
Phone:	+49 228 733451
E-Mail:	croceins.uni-bonn.de

Research Interests

Computational Fluid Dynamics
Free Surface Flows with Surface Tension and Floating Bodies
Simulation of Turbulent Flows including Rough Wall Boundaries
Porous Media Flow
Viscoplastic and Viscoelastic Flow
Moving-Contact-Line Problem in Coating Processes
Numerics for Transport-Problems
High Performance Parallel Computing

Research Projects

	Cluster of Excellence: Hausdorff Center for Mathematics Project Area J: High-dimensional problems and multi-scale methods
	SFB 611: Singular phenomena and scaling in mathematical models Project C3: Numerical optimization of dynamical wetting processes
	Development of CFD Code NaSt3DGP
	Flow through Porous Media: Computation of Permeability of Textile Reinforcements Cooperation with Katholieke Universiteit Leuven, Belgium
	Simulation of viscoplastic fluids with free surfaces Cooperation with Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland
	Smallscale Modelling of Flow through and around Hydraulic Constructions, Waterways and Watercrafts Cooperation with Bundesanstalt für Wasserbau (BAW), Germany

Completed Research Projects

Simulation of a Single Droplet Accelerated and Deformed by a Uniform Gas Flow
Cooperation with European Space Agency (ESA), the Netherlands

Some mpeg-movies

Temperature and large eddy turbulence	Incompressible Two-Phase Flows	Free Surface Flows with Voxel Obstacles
Moving-Contact-Line Problem in Coating Processes	Gas-Bubble Dynamics	Thermal and Chemical Transport
Lock Simulations	Mold Filling	Surface Tension Effects
Floating Body	Free Surface Flows with Level-Set-Geometry	Level-Set Particle Hybrid Schemes

Teaching

SS 2009:
Numerical Simulation - Computational Fluid Dynamics, module P5E1
Laboratory with Prof. Dr. Michael Griebel and Dr. Martin Engel.
SS 2008:
Numerische Simulation in der Strömungsmechanik (Computational Fluid Dynamics), module P5E1
Laboratory with Prof. Dr. Michael Griebel and Dr. Martin Engel.
SS 2005:
Numerische Simulation in der Strömungsmechanik (Computational Fluid Dynamics)
Laboratory with Prof. Dr. Michael Griebel and Dr. Martin Engel.
WS 2003/2004:
Numerische Simulation in der Strömungsdynamik (Computational Fluid Dynamics)
Laboratory with Prof. Dr. Michael Griebel and Dr. Martin Engel.

Contents of the Computational Fluid Dynamics (CFD) laboratory

The Navier-Stokes equations.
Discretization and numerical solution.
Data structures.
Example: driven cavity
Further boundary conditions.
General geometries.
Example: Karman vortex street.
Visualization with particle tracing and streaklines.
Free boundary problems.
Parallelization by domain decomposition under PVM/MPI.
Heat transport.
Example: natural convection

Diploma Theses (co-supervised)

[1]	P. Zaspel. Zweiphasige Navier-Stokes Fluidsimulationen in Maya: Konfiguration, Visualisierung und Animation. Diplomarbeit, Institut für Numerische Simulation, Universität Bonn, Apr. 2009. [ bib \| .pdf 1 ]
[2]	M. Bürger. Eine adaptive Hamilton-Jacobi Level-Set-Reinitialisierung für Zweiphasenströmungen. Diplomarbeit, Institut für Numerische Simulation, Universität Bonn, July 2008. [ bib \| .pdf 1 ]
[3]	S. Claus. Numerical Simulation of Unsteady Three-Dimensional Viscoelastic Oldroyd-B and Phan-Thien Tanner Flows. Diplomarbeit, Institut für Numerische Simulation, Universität Bonn, July 2008. [ bib \| .pdf 1 ]
[4]	M. Klitz. Homogenised Fluid Flow Equations in Porous Media with Application to Permeability Computations in Textiles. Diplomarbeit, Institut für Numerische Simulation, Universität Bonn, July 2006. [ bib \| .ps.gz 1 \| .pdf 1 ]

Publications

[1]	R. Croce, M. Griebel, and M. A. Schweitzer. Numerical Simulation of Bubble and Droplet-Deformation by a Level Set Approach with Surface Tension in Three Dimensions. International Journal for Numerical Methods in Fluids, 62(9):963-993, 2009. Also available as SFB 611 Preprint no 431. [ bib \| DOI \| .pdf 1 ]
[2]	B. Verleye, R. Croce, M. Griebel, M. Klitz, S. Lomov, G. Morren, H. Sol, I. Verpoest, and D. Roose. Permeability of textile reinforcements: simulation, influence of shear, validation. In Composites science and technology, volume 68, pages 2804-2810. Elsevier Applied Science Publishers, Oct. 2008. [ bib \| .pdf 1 \| Abstract ]
[3]	R. Croce, M. Griebel, and M. A. Schweitzer. Numerical Simulation of Droplet-Deformation by a Level Set Approach with Surface Tension. Preprint 395, Sonderforschungsbereich 611, Universität Bonn, Bonn, Germany, 2008. [ bib \| .pdf 1 ]
[4]	B. Verleye, R. Croce, M. Griebel, M. Klitz, S. Lomov, G. Morren, H. Sol, I. Verpoest, and D. Roose. Permeability of textile reinforcements:simulation; influence of shear, nesting and boundary conditions; validation. In Proceedings of the 9th International Conference on Flow Processes in Composite Materials, volume 9, Québec, 2008. International Conference on Flow Processes in Composite Materials edition. [ bib \| .pdf 1 \| Abstract ]
[5]	B. Verleye, M. Klitz, R. Croce, D. Roose, S. Lomov, and I. Verpoest. Computation of the permeability of textiles with experimental validation for monofilament and non crimp fabrics. In Computational Textile, volume 55 of Studies in Computational Intelligence, chapter 6, pages 93-110. Springer Berlin / Heidelberg, May 2007. [ bib \| DOI \| .pdf 1 ]
[6]	B. Verleye, R. Croce, M. Griebel, M. Klitz, S. Lomov, I. Verpoest, and D. Roose. Finite difference computation of the permeability of textile reinforcements with a fast stokes solver and new validation examples. In E. Cueto and F. Chinesta, editors, AIP Conference Proceedings, volume 907, pages 945-950, 2007. [ bib \| .pdf 1 ]
[7]	B. Verleye, M. Klitz, R. Croce, D. Roose, S. Lomov, and I. Verpoest. Computation of the permeability of textiles. Preprint 269, Sonderforschungsbereich 611, Rheinische Friedrich-Wilhelms-Universität Bonn, Apr. 2006. Also available as Report TW 455, K.U. Leuven, Department of Computer Science. [ bib \| .pdf 1 ]
[8]	J. Strybny, C. Thorenz, R. Croce, and M. Engel. A parallel 3d free surface navier-stokes solver for high performance computing at the german waterways administration. In The 7th Int. Conf. on Hydroscience and Engineering (ICHE-2006), Philadelphia, USA, September 2006. [ bib \| .pdf 1 ]
[9]	B. Verleye, M. Klitz, R. Croce, M. Griebel, S. Lomov, D. Roose, and I. Verpoest. Predicting the permeability of textile reinforcements via a hybrid Navier-Stokes/Brinkman solver. In Binetruy, editor, Proceedings of the 8th International Conference on Flow Processes in Composite Materials (FPCM-8), pages 65-72, Ecole des Mines de Douai, Douai, 2006. [ bib \| .pdf 1 ]
[10]	B. Verleye, M. Klitz, R. Croce, D. Roose, S. Lomov, and I. Verpoest. Computation of permeability of textile reinforcements. In Proceedings of the 17th IMACS World Congress, Paris, France, 2005. Also as Preprint No. 228, SFB 611, University of Bonn. [ bib \| .pdf 1 \| Abstract ]
[11]	R. Croce, M. Griebel, and M. A. Schweitzer. A Parallel Level-Set Approach for Two-Phase Flow Problems with Surface Tension in Three Space Dimensions. Preprint 157, Sonderforschungsbereich 611, Universität Bonn, 2004. [ bib \| .pdf 1 ]
[12]	R. Croce. Ein paralleler, dreidimensionaler Navier-Stokes-Löser für inkompressible Zweiphasenströmungen mit Oberflächenspannung, Hindernissen und dynamischen Kontaktflächen. Diplomarbeit, Institut für Angewandte Mathematik, Universität Bonn, Bonn, Germany, 2002. [ bib \| .ps.gz 1 \| .pdf 1 ]
[13]	P. Boeker, M. Wittkowski, O. Wallenfang, F. Koster, R. Croce, M. Griebel, B. Diekmann, and P. Schulze-Lammers. Tracerverfahren zur Validierung von Ausbreitungsmodellen für Geruchsemissionen. Agrartechnische Forschung, Landtechnik-net, pages 92-97, 2001. refereed electronical journal. [ bib \| .pdf 1 ]
[14]	O. Wallenfang, P. Boeker, F. Koster, R. Croce, M. Griebel, B. Diekmann, and P. Schulze-Lammers. Zeitauflösendes Ausbreitungsmodell für Geruchsemissionen. In Proceedings: 5. Int. Tagung Bau, Technik und Umwelt, pages 86-91, Hohenheim, 2001. [ bib ]
[15]	P. Boeker, O. Wallenfang, F. Koster, R. Croce, B. Diekmann, M. Griebel, and P. Schulze-Lammers. The modelling of odour dispersion with time-resolved models. Agrartechnische Forschung, 4:E84-E89, 2000. refereed electronical journal. [ bib \| .pdf 1 \| Abstract ]

Press Reports

P. Boeker, M. Wittkowski, O. Wallenfang, F. Koster, R. Croce, M. Griebel, B. Diekmann, and P. Schulze-Lammers. Vom Winde verweht: Bonner Wissenschaftler modellieren die Ausbreitung von Gerüchen. Forsch, Bonner Universitäts-Nachrichten, April 2001.

Research Stays

[1]	Ecole Polytechnique Federale de Lausanne (EPFL), Laboratoire d'Hydraulique Environnementale, Lausanne, Switzerland, March 4-31, 2007.
[2]	Florida State University (FSU), School of Computational Science, Tallahassee, Florida, USA, October 1 - December 10, 2006.
[3]	Katholieke Universiteit Leuven, Departement Computerwetenschappen, Leuven, Belgium, March 6-31, 2006.
[4]	Ecole Polytechnique Federale de Lausanne (EPFL), Laboratoire d'Hydraulique Environnementale, Lausanne, Switzerland, February 16-26, 2006.
[5]	The George Washington University, Department of Mathematics, Washington DC, USA, 24.-31. January, 2004.
[6]	Workshop: Turbulenz - Grundlagen der Turbulenzmodellierung, LSTM-Erlangen, Germany, 7.-11. April, 2003.
[7]	Workshop: Level-set methods and numerical methods for nonlinear evolution PDEs, SINTEF, Geilo, Norway, 2.-7. March, 2003.

Talks

Conference contributions

[1]	Incompressible Two-Phase Flows around Complex Rigid Objects, Two-phase incompressible flows: modeling aspects and methods for numerical simulation, RWTH Aachen, Germany, June 25-27, 2007.
[2]	Weiterentwicklung eines dreidimensionalen numerischen Mehrphasenmodells zum Einsatz auf einem Hochleistungsrechner der Bundesanstalt für Wasserbau, Mehrdimensionale hydronumerische Modellierung von Wasserbauwerken und Schiffen, BAW Karlsruhe, Germany, April 26, 2007.
[3]	Current Developments in NaSt3D/GPF for BAW - Embedded Geometries and Floating Rigid Bodies, BAW Kolloqium Mehrdimensionale hydronumerische Modellierung von Wasserbauwerken und Schiffen, Karlsruhe, Germany, April 26, 2007.
[4]	Simulation of Floating Rigid Bodies in Two Phase Flows, CSE07 - SIAM conference on Computational Science and Engineering, Costa Mesa, California, USA, February 19-23, 2007.
[5]	Computation of permeability of textile reinforcements, IMACS2005 - 17th IMACS World Congress Scientific Computation, Applied Mathematics and Simulation, Paris, France, July 11-15, 2005.
[6]	A Parallel 3D Level-Set Approach for Two-Phase Flow Problems with surface tension, 2nd International Berlin Workshop on Transport Phenomena with Moving Boundaries, TU Berlin, Germany, October 9-10, 2003.
[7]	A parallel 3D incompressible Navier-Stokes solver for two-phase flow problems with surface tension using a level-set approach, CNRS-DFG - Modelling and Simulation of Liquid-Vapor Flows, Kirchzarten, Freiburg, Germany, July 15-17, 2003.
[8]	A parallel three dimensional incompressible Navier-Stokes solver for two-phase flow problems with surface tension using a level-set approach, AMFLOW - Adaptive Methods for Flow Computation, Heidelberg, Germany, October 22-24, 2001.

Other Talks

[1]	Coating Processes and New Numerical Challenges within Level-Set Methods, Alcan Technology & Management Ltd., Neuhausen, Switzerland, January 18, 2007.
[2]	Free Surface Flows and Embedded Geometries, Florida State University, School of Computational Science, Tallahassee, Florida, USA, October 20, 2006.
[3]	Level-Set simulation of droplet deformations due to shock wave disturbances,, European Space Agency (ESA), Noordwijk, Netherlands, April 27, 2006.
[4]	Predicting the permeability of textile reinforcements via a hybrid Navier-Stokes/Brinkman solver, Katholieke Universiteit Leuven, Departement Computerwetenschappen, Leuven, Belgium, March 6-31, 2006.
[5]	Simulation of the non-Boussinesq lock-exchange problem, Laboratoire d'Hydraulique Environnementale, Ecole Polytechnique Federale de Lausanne, Lausanne, Switzerland, February 16-26, 2006.
[6]	A Parallel 3D Level-Set Approach for Two-Phase Flow Problems with surface tension, Lehrstuhl fuer Strömungsmechanik, Erlangen, Germany, January 28, 2005.
[7]	A Parallel 3D Level-Set Approach for Two-Phase Flow Problems with surface tension, The George Washington University, Washington DC, USA, January 24-31, 2004.
[8]	NaSt3DGPF - A Simulation Toolkit for Multi-Phase-Flows (with M. Griebel), Bundesanstalt für Wasserbau (BAW), Karlsruhe, Germany, February 24, 2003.
[9]	Ein paralleler, dreidimensionaler Navier-Stokes-Löser für inkompressible Zweiphasenströmungen mit Oberflächenspannung, Hindernissen und dynamischen Kontaktflächen, Fraunhofer Institute, Kaiserslautern, Germany, August 30, 2002.