Current Projects

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Understanding of microstructure evolution in copper indium selenide (CISe) and copper gallium indium selenide (CGSe)

Nov 01, 2012 — Dec 31, 2018

Photovoltaic devices, which operate by directly converting solar energy into electricity, have become rapidly one of the most important “clean” energy sources. The optimization of thin-film solar cells for such use has been mainly a trial-and-error process. A detailed understanding of the relationships between growth processes, structural defects, strain, and electrical properties would benefit the development of these devices considerably. In the Virtual Institute "Microstructure control ...

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Wear simulation and shape optimization of knee implants. Subproject 4: Uncertainty quantification

Jul 01, 2013 — Jul 31, 2017

One of very common surgeries daily performed in German clinics is the human knee joint replacement. For the market admittance of joint implants, standardized wear tests has to be performed. During the design phase, similar tests are necessary as well. Those tests are very cost and time expensive. The project aims at the development of simulation and optimization methods for substituting some of the design phase tests by numerical simulations. Additionally, the design process shall be ...

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Reduced basis methods in orthopedic hip surgery planning

Jun 01, 2014 — May 31, 2017

This project aims at the development, analysis and implementation of algorithms for computer-assisted planning in hip surgery and hip joint replacement by fast virtual testing. Fast forward simulations of patient-specific motion of hip joints and implants in 3D shall be enabled by exploiting suitable a priori information. To this end, we will derive, analyze, and implement reduced basis methods for heterogeneous joint models (reduced approximation). An application of the joint model for an ...

Scaling Cascades in Complex Systems

Particles in lipid bilayers

Oct 01, 2014 — Sep 30, 2018

The interplay of proteins and curvature of lipid bilayers is well-known to regulate cell morphology and a variety of cellular functions, such as trafficking or signal detection. Here, interplay not only means that proteins can induce curvature by shaping and re­modeling the membrane, but also that the membrane curvature plays an active role in creating functional membrane domains and organizing membrane proteins, includ­ing their conformation dynamics. Moreover, microscopic causes, such as ...

Scaling Cascades in Complex Systems

Multilevel coarse graining of multiscale problems

Oct 01, 2014 — Sep 30, 2018

Molecular dynamics and related computational methods enable the description of bio­logical systems with all-atom detail. However, these approaches are limited regarding simulation times and system sizes. A systematic way to bridge the micro-macro scale range between molecular dynamics and experiments is to apply coarse-graining (CG) techniques. The basic idea of (CG) is to replace the high-dimensional all-atom description of the system by a reduced representation that preserves a suf.cient ...

Scaling Cascades in Complex Systems

Fault networks and scaling properties of deformation accumulation

Oct 01, 2014 — Sep 30, 2018

Earthquake statistics reveal scale invariance over 10 orders of magnitude of the earthquake strength as expressed, e.g., by the famous Gutenberg–Richter power law. Well- established explanations for earthquake activity in the lithosphere are based on strain accumulation and stress release along fault networks chiefly in plate boundary zones as described by rate and state dependent (RSD) friction models. However, because of the incompleteness of the real-world record of earthquakes and ...

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Raum-zeit-parallele adaptive Simulation von Phasenfeldmodellen auf Höchstleistungsrechnern

May 01, 2016 — Apr 30, 2019

Förderprogramm: IKT 2020 – Forschung für Innovationen "Anwendungsorientierte HPC-Software für das Hoch-  und Höchstleistungsrechnen in Wissenschaft und Wirtschaft"

For completed projects please see here.