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Einrichtungen >> Technische Fakultät (TF) >> Department Maschinenbau (MB) >> Lehrstuhl für Technische Mechanik (LTM, Prof. Steinmann) >>
Modellierung von Erstarrungsprozessen mit der Randelementmethode

The focus of this joint research is the computational modelling of solid-liquid phase change phenomena. These phenomena represent a key for understanding nature, such as melting or freezing of Earth's ice caps, and technology, such as modern manufacturing and materials processing of metals, ceramics, polymers, and their composites. The modelling of such systems is particularly complicated due to its multi-phase, multi-component, multi-scale, nonlinear and anisotropic character, in most situations.
The development of boundary-domain integral methods for moving and free boundary problems was considered at the beginning. These methods have been succeeded by the radial basis functions structured dual reciprocity methods in the second generation, and transformed into combined, fundamental solution - radial basis function strategies, without any integral evaluation, in the third generation. Respectively, the meshes have been gradually simplified. The domain polygonisation in the second generation and later also the boundary polygonisation have been both replaced by the 'meshless pointisation'.
The evolution of our numerical approaches has made possible the substantial enhancement of the physical complexity of the systems under consideration. In the first period, the conduction governed melting and freezing systems have been tackled, followed by the liquid phase convection modelling, and very recently, complemented by the dissolution and solidification simulations of industrially relevant multicomponent systems with a perspective towards microstructure formation modelling in the future.

Publikation (in Vorbereitung):
Perko, J.; Sarler, B.; Kuhn, G.: Natural convection in porous media a meshless solution of the Darcy-Brinkman model. In: ZAMM

Projektleitung:
Prof. Dr.-Ing. habil. Günther Kuhn, Prof. dr. Bozidar Sarler

Stichwörter:
computational modelling of solid-liquid phase change phenomena; boundary element method

Laufzeit: 1.1.1999 - 31.12.2004

Förderer:
Slovene-Bavarian bilateral scientific exchange program

Mitwirkende Institutionen:
Laboratory for Multiphase Processes, Nova Gorica Polytechnic, Vipavska 13, SI-5000 Nova Gorica, Slovenia

Kontakt:
Kuhn, Günther
Telefon 09131-8528502, Fax 09131-8528503, E-Mail: guenther.kuhn@fau.de
Publikationen
Sarler, B. ; Kuhn, Günther: Dual reciprocity boundary element method for convective-diffusive solid-liquid phase change problems, Part 1, Formulation. In: Engineering Analysis with Boundary Elements, 21, (1998), S. 53 - 63
Sarler, B. ; Kuhn, Günther: Dual reciprocity boundary element method for convective-diffusive solid-liquid phase change problems, Part 2, Numerical examples. In: Engineering Analysis with Boundary Elements, 21, (1998), S. 65 - 79
Sarler, B. ; Kuhn, Günther ; Bialecki, R. A.: DRBEM solution of mass and momentum transport in solidification. In: ZAMM, 79, (1999), S. 745 - 746
Sarler, B. ; Kuhn, Günther: Primitive variable dual reciprocity boundary element method solution of incompressible Navier-Stokes equations. In: Engineering Analysis with Boundary Elements, 23, (1999), S. 443 - 455
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