Computation

A wide variety of calculation methods are an integral part of the research and teaching activities at the Chair of Casting Technology. In addition to classic simulation methods such as computational fluid dynamics (CFD) and the finite element method (FEM), statistical calculation methods from the field of machine learning (ML) are also applied and further developed at the chair. Classic FEM, CFD, or coupled simulations are mainly calculated at the chair using COMSOL Multiphysics, ANSYS, and ABAQUS. In addition, numerous CFD applications are calculated in OpenFOAM, an open-source software. Proprietary software for pre- and post-processing as well as for calculation is mainly developed in Matlab, Python, or C++. Statistical calculation methods from the field of ML, such as neural networks, are primarily implemented and used at our Chair in Python. A wide variety of Python libraries, such as Pytorch, Keras, deepxde, etc., are used for this purpose.

Depending on the specific requirements of the respective application, the calculations themselves are performed using the chair’s hardware resources (see below). As part of FAU, the Chair of Casting Technology also has access to the high-performance computing (HPC) resources of the NHR (https://hpc.fau.de/), which are particularly necessary for highly parallelized calculations (hyperparameter studies, generation of AI datasets, etc.).

Hardware ConfigurationDescription
WorkstationIntel(R) Xeon(R) W-2295 CPU @ 3.00GHz, 128 RAM, NVIDIA QUADRO RTX 4000 8GB
WorkstationIntel(R) Xeon(R) W-1370P @ 3.60GHz, 128GB RAM, multiple GPUS with total of 24GB
WorkstationIntel(R) Xeon(R) W-2295 CPU @ 3.00GHz, 128 GB RAM, NVIDIA RTX A5000 24GB
WorkstationAMD Ryzen 9 9950X 16-Core Processor @ 4.30 GHz, 128 RAM

NameLGT-specific applications
Ansys MultiphysicsSimulation of die filling, air entrapment, and solidification with structural analysis to predict residual stresses, distortion, and thermal fatigue.
Comsol MultiphysicsCoupled physics modeling (heat transfer, fluid flow, phase change,) for mold filling, solidification, contraction, plus parametric studies and optimization of processes
Abaqus/CAENonlinear FEA for thermo-mechanical behavior of dies and castings, including cyclic thermal loading, stress/strain evolution, life estimation. Simulation of property meausing processes such as Indentation.
OpenFoamSimulation of die filling with diverse fidelity turbulence models such as RANS, Large Eddy Simulation, etc.
MatlabNumerical computing, data analysis, visualization, algorithm development, pre- and post processing of simulations