Foam simulation

The foam simulation focuses on the modelling and implementation of the physical phenomena during foam formation of metallic as well as polymeric materials. The aim is to predict improved process strategies of foam formation.
Metal Foams:
Until today, metallic foams are not common despite their potential for energy absorption and ultra-light components. The main disadvantage are the inhomogenities of the pore structure, which includes variations in the pore size, geometry and wall size. The aim is to understand the underlying effects during foam formation to improve the process.
The implemented software bases on the lattice Boltzmann method, covers he most important physical effects during foam formation and is able to predict modified process strategies. The implementation comprises the hydrodynamic, diffusive and thermodynamic conservation equations applied on free surfaces. The physical models cover the growth, coarsening, reordering and collapse of foam bubbles as well as effects of the whole pore network like aging and drainage due to capillarity and wetting.
Viscoelastic Foams:
Foam materials are due to their cellular structure an interesting material class with attractive properties. The software used for metal foams was extended to simulate the viscoelastic effects during foaming of polymers. Therefore, the numerical method was extended by a rheological model for viscoelastic fluids applied on free surfaces. With this software, the influence of different process parameters on the foam formation was studied.

• Osmanlic F.:
  Modeling of Selective Laser Sintering of Viscoelastic Polymers (Dissertation, 2019)
• Osmanlic F., Körner C.:
  Lattice Boltzmann method for Oldroyd-B fluids
  In: Computers & Fluids 124 (2016), p. 190-196
  ISSN: 0045-7930
  DOI: 10.1016/j.compfluid.2015.08.004
• Inayat A., Schwerdtfeger J., Freund H., Körner C., Singer R., Schwieger W., Freund H.:
  Periodic open-cell foams: Pressure drop measurements and modeling of an ideal tetrakaidecahedra packing
  In: Chemical Engineering Science 66 (2011), p. 2758-2763
  ISSN: 0009-2509
  DOI: 10.1016/j.ces.2011.03.031
• Körner C., Attar E.:
  Numerical Simulation of Foam Solidification Phenomena
  MetFoam 2009 (Bratislava)
  In: MetFoam 2009 - Proceedings of the 6th Interational Conference on Porous Matals and Metallic Foams 2009
• Körner C.:
  Integral Foam Molding of Light Metals
  Springer, 2008
  ISBN: 978-3-540-68838-9
• Thürey N., Pohl T., Rüde U., Oechsner M., Körner C.:
  Optimization and Stabilization of LBM Free Surface FlowSimulations using Adaptive Parameterization
  In: Computers & Fluids 35 (2006), p. 934-939
  ISSN: 0045-7930
  URL: http://www.sciencedirect.com/science/article/pii/S004579300500157X/pdfft?md5=59701b54104d0daae6791fd1b2140ffa&pid=1-s2.0-S004579300500157X-main.pdf
• Körner C., Thies M., Hofmann T., Thürey N., Rüde U.:
  Lattice Boltzmann Model for Free Surface Flow for Modeling Foaming
  In: Journal of Statistical Physics 121 (2005), p. 179-196
  ISSN: 0022-4715
  DOI: 10.1007/s10955-005-8879-8
  URL: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.321.499&rep=rep1&type=pdf
• Körner C., Pohl T., Rüde U., Thürey N., Zeiser T.:
  Parallel Lattice Boltzmann Methods for CFD Applications
  In: Numerical Solution of Partial Differential Equations on Parallel Computers, New York: Springer, 2005, p. 439-465 (Lecture Notes in Computational Science and Engineering, Vol.51)
  ISBN: 3-540-29076-1
  URL: https://www10.informatik.uni-erlangen.de/Publications/Papers/2005/LBMCFD_LNCSE51.pdf
• Oechsner M., Thies M., Arnold M., Körner C., Singer R.:
  Simulation of Metal Foam Formation with the Lattice Boltzmann Method
  International Symposium on Cellular Metals and Polymers (Fürth)
  In: R.F. Singer, C. Körner, V. Altstädt, H. Münstedt (ed.): Cellular Metals and Polymers, Zürich: 2005
• Körner C., Pohl T., Rüde U., Thürey N., Hofmann T.:
  FreeWIHR: Lattice Boltzmann Methods with Free Surfaces and their Application in Material Technology
  KONWIHR Results Workshop (Garching)
  In: High Performance Computing in Science and Engineering, Garching 2004, Berlin/Heidelberg: 2005
• Thies M.:
  Modellierung des Schaumbildungsprozesses von Metallen mit Hilfe der Lattice-Boltzmann-Methode (Dissertation, 2005)
• Thürey N., Rüde U., Körner C.:
  Interactive Free Surface Fluids with the Lattice Boltzmann Method
  (2005), p. 10
  URL: https://www10.cs.fau.de/publications/reports/TechRep_2005-04.pdf
• Körner C., Pohl T., Rüde U., Thürey N., Hofmann T.:
  FreeWiHR --- LBM with Free Surfaces
  (2004), p. 15
  URL: https://www10.cs.fau.de/publications/reports/TechRep_2004-06.pdf
• Rüde U., Thürey N., Körner C., Pohl T.:
  Simulation von Metallschaum mittels der Lattice-Boltzmann Methode
  35 (2003), p. 4-8
• Körner C., Singer R.:
  The Physics of Foaming: Structure Formation and Stability
  In: B. Kriszt, H. P. Degischer (ed.): Handbook of Cellular Metals, München: Wiley-VCH, 2002, p. 33-43
  ISBN: 3-527-30339-1
• Körner C., Thies M., Singer R.:
  Modeling of metal foaming with lattice Boltzmann automata
  In: Advanced Engineering Materials 4 (2002), p. 765-769
  ISSN: 1438-1656
  DOI: 10.1002/1527-2648(20021014)4:103.0.CO;2-M
• Körner C., Thies M., Arnold M., Singer R.:
  Modelling of metal foaming by in-situ gas formation.
  MetFoam 2001 (Bremen, 18. June 2001 - 20. June 2001)
  In: J. Banhart, M. F. Ashby, N. A. Fleck (ed.): Cellular Metals and Foaming Technology, Bremen: 2001
• Arnold M., Körner C., Thies M., Singer R.:
  Experimental and Numerical Investigation of the Formation of Metal Foam
  Materials Week 2000 (München, 25. September 2000 - 28. September 2000)
• Körner C., Singer R.:
  Numerical Simulation of Foam Formation and Evolution with Modified Cellular Automata
  MetFoam '99 (Bremen)
  In: J. Banhart, M. F. Ashby, N. A. Fleck (ed.): Metal Foams and Porous Metal Structures, Bremen: 1999