Thermodynamic Modeling and Analysis of Phase Transitions

- Research Group -

Wolfgang Dreyer

Pierre-Étienne Druet, Paul Gajewski, Sebastian Jachalski, Olaf Klein, Jürgen Sprekels, Barbara Wagner

Ina Hohn

The research group studies modelling, analysis and simulations of dynamical phenomena in the context of phase transitions and of thin films. Many industrial production processes are accompanied by wanted and unwanted phase transitions, and these also play an important role concerning the application of modern multi-functional materials. In this field the research group conducts interdisciplinary projects with applicants, in particular from industry. The current topics are

- Production and use of modern materials
- Energy technology
- Multi-scale problems and in particular thin films

In recent years the research group developed a bundle of new methods and brings forward on that basis the solution of essential problems, including

- Production of solar silicon
- Improvement of electro-chemical processes in lithium-ion batteries and in hydrogen storage in metals
- Design of new and efficient solar cells by the study of the dynamics of quantum dots

The complexity of the treated problems arise due to various strong couplings, for example: interface motion produce mechanical stresses, changing electromagnetic fields influence flow patterns, chemical reactions, the appearance of precipitates in crystals and the formation of quantum dots on crystalline surfaces lead to lattice deformations, non-local radiation fields interact with non-convective heat conduction, long-range interatomic forces lead to non-local partial differential equations. The thermodynamical modelling happens on all relevant space and time scales. Often it relies on atomistic motivations so that the material parameter appearing in the resulting field equations have an intuitive meaning.

The - research group -takes part in the following main application areas: