Modeling and Simulation
Head of the Group
Dr.-Ing. Stefanie Elgeti
Chair for Computational Analysis of Technical Systems
The working group “Modeling and Simulation“ is concerned with techniques to describe as well as to qualitatively and quantitatively model the various melt-based processes. By dynamically modulating modeling boundary conditions and simulation discretizations, calculation times are to be optimized and the precisions of simulation results increased.
Modeling the Energy Transfer at Boundary Surfaces
Various subprojects are confronted with the topic of heat transfer into or out of the melt and for this reason need an adequate heat transfer model. In order to increase the efficiency of this large working group, it is divided into two subgroups: one group is concerned with developing new heat transfer models for metals and plastics, the other group applies these models in their project-specific activities. The modeling group works on subprojects B3, B4, B6, B7, and B8; the application group works on subprojects A5, A7, A10, and B1. There will be an intense exchange between these groups and the diagnostics subgroup “Determination of Heat Transfer Characteristics in Casting Processes.” The latter subgroup is responsible for providing the required model parameters for the various materials with the help of experiments.
Process Model for Molten Pool Dynamics and Multiscale, Multiphase Modeling of the Melt
The working group “Process Model for Molten Pool Dynamics and Multiscale, Multiphase Modeling of the Melt” is concerned with all subprojects that focus on simulating the flow within the melt. In these subprojects, solidification will be modeled using a simple approach (material-dependent viscosity).
Thermomechanical Multiscale Modeling of Solid-Fluid Interactions in the Solidification Process
The working group “Thermomechanical Multiscale Modeling of Solid-Fluid Interactions in the Solidification Process” investigates the solidification of metals and plastics. In the subprojects assigned to the group, the model development process focuses on a solid-body mechanical approach as well as on solidification physics. Special emphasis is placed on the development and growth of the microstructure.
Efficient Numerical Methods
The “Efficient Numerical Methods” working group focuses on numerical approaches, addressing topics such as efficient reduction methods, novel discretization techniques such as the “discontinuous Galerkin method” or the novel time-space discretization of subproject B5,” efficient methods for the calculation of effective properties, and the development of dedicated optimization algorithms.