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Latest Projects (Overview)

Find out about the latest simulation projects run on the GCS supercomputers. For the complete overview of projects, sorted by research fields, please choose from the list in the left column.

Distribution amplitudes of the η and η' mesons

Distribution Amplitudes of the η and η' Mesons

In this project properties of two mesons, i.e. particles made up of a quark and an anti-quark, namely the η and the η', are studied by numerically simulating the underlying theory, QCD, on a four-dimensional spacetime lattice. The focus of previous studies was on establishing the masses of these particles, which are intricately related to the so-called axial anomaly. In this project, for the first time, the internal structure of these mesons was simulated too. This can be characterized in lightcone kinematics, which is relevant for collider experiments, by so-called distribution amplitudes (DAs). The normalization of a DA is also known as a decay constant. Four such previously unknown constants have been determined with full assessment of all systematics.

Principal Investigator: Andreas Schäfer, Institute for Theoretical Physics, Regensburg University (Germany)
HPC Platform: JUQUEEN (JSC) - Date published: February 2019 (hru28)
More: Distribution Amplitudes of the η and η' Mesons …

R2Wall : Resolved LES to support Wall-Model Development

R2Wall: Resolved LES to support Wall-Model Development

Wind turbine and aircraft design relies on numerical simulation. Current aerodynamic models represent turbulence not directly but model its averaged impact. Such models are only reliable near the design point and require vast experience of the design engineer. Industry wants therefore to enable more accurate methods, such as wall-modeled Large-Eddy Simulation (wmLES) which represents turbulent flow structures directly. R2Wall provides a high-resolution simulation of the NACA4412 airfoil as reference data for the development of wall-models for LES and turbulence models in general. This project has enabled the definition of guidelines for future computations, and the calibration of wall-models.

Principal Investigators: Koen Hillewaert, Ariane Frère, Michel Rasquin, Cenaero Research Center (Belgium)
HPC Platform: JUQUEEN (JSC) - Date published: February 2019 (PRA096)
More: R2Wall: Resolved LES to support Wall-Model Development …

Emergent Locality in Quantum Systems with Long Range Interactions

Emergent Locality in Quantum Systems with Long Range Interactions

How fast can information travel in a quantum system? While special relativity yields the speed of light as a strict upper limit, many quantum systems at low energies are in fact described by nonrelativistic quantum theory, which does not contain any fundamental speed limit. Interestingly enough, there is an emergent speed limit in quantum systems with short ranged interactions which is far slower than the speed of light. Fundamental interactions between particles are, however, often of long range, such as dipolar interactions or Coulomb interactions. A very-large scale computational study performed on Hazel Hen revealed that there is no instantaneous information propagation even in the presence of extremely long ranged interactions and that most signals are contained in a spatio-temporal light cone for dipolar interactions.

Principal Investigators: Dr. Fabien Alet, CNRS, Toulouse University (France), and Dr. David J. Luitz, MPIPKS, Dresden (Germany)
HPC Platform: Hazel Hen (HLRS) - Date published: February 2019 (STIDS)
More: Emergent Locality in Quantum Systems with Long Range Interactions …

Sulfur in Ethylene Epoxidation on Silver

Sulfur in Ethylene Epoxidation on Silver

One of the most influential chemicals in our daily lives is something many of us will never see: ethylene oxide. This chemical is a critical ingredient in our modern world, used to make everything from the plastic fibers of our clothes to the lubricants in our cars. Virtually all of it is produced by the catalytic reaction of ethylene and oxygen over a silver surface but, while this process has been known since 1931, just how it happens has remained a mystery. Researchers have used high-performance computing to gain new insight into this mystery by identifying the structure of the active catalyst surface and showing how it mediates the reaction of ethylene and oxygen to form ethylene oxide.

Principal Investigator: Travis Jones, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Department of Inorganic Chemistry, Berlin (Germany)
HPC Platform: Hazel Hen of HLRS - Date published: January 2019 (SEES2)
More: Sulfur in Ethylene Epoxidation on Silver …

LACEHIP: LArge scale CEllular model of the HIPpocampus

LACEHIP: LArge scale CEllular model of the HIPpocampus

The main aim of this project was the development of the first detailed large-scale 3D model of the CA1 area of the hippocampus, a brain region well known for being involved in cognitive processes and deeply affected by aging and major brain diseases such as Alzheimer’s Disease and Epilepsy. Because of the current limitations in the experimental techniques, the cellular mechanisms underlying these processes remain relatively unknown. With our model, we maintain the 3D layout of the real system, and the neurons’ activity can be observed in exactly the same format as the in vivo recordings, with the fundamental advantage of being able to track network, cellular, and synaptic activity at any point of the network, and directly compare the results with experiments at all levels, including fMRI and EEGs. We expect that the model will significantly advance the state of the art in the field, and will help to predict and explain several experimental and behavioral data.
  
Principal Investigator: Michele Migliore, Consiglio Nazionale delle Ricerche (CNR), I.B.F. (Italy)
HPC Platform: JUQUEEN of JSC - Date published: January 2019 (PRA098)
More: LACEHIP: LArge scale CEllular model of the HIPpocampus …

HETS: HEat (and Mass) Transfer in Turbulent Sprays (PRACE)

HETS - HEat (and Mass) Transfer in Turbulent Sprays

The focus of this project is the direct numerical simulation (DNS) of an evaporating spray in a turbulent channel flow. The complexity of the phenomenon lies in the nonlinear interaction of phase change thermodynamics and turbulent transport mechanisms at a multitude of scales. The recent availability of larger supercomputing power, together with our novel technique to treat efficiently the interface resolved phase change, enables us to perform the first DNS of more than 14k droplets evaporating in turbulent flow, with full coupling of momentum, heat and mass transfer, both intra- and inter-phase.

Principal Investigator: Luca Brandt, Department of Mechanics, KTH, Royal Institute of Technology (Sweden)
HPC Platform: Hazel Hen (HLRS) - Date published: January 2019 (PP16153682)
More: HETS - HEat (and Mass) Transfer in Turbulent Sprays …

Disconnected contributions to Generalized Form Factors (GPDs)

Disconnected Contributions to Generalized Form Factors (GPDs)

The main focus of high energy physics research is the search for signals of physics beyond the Standard Model. Many of the experiments built for this purpose involve protons or neutrons (collectively termed nucleons), either in the beam, such as at the Large Hadron Collider at CERN, or within the nuclei of the targets, such as those used for dark matter detection experiments. In order to extract information on the underlying interactions occurring in these experiments between quarks and other fundamental particles, one needs to know the distribution of the quarks within the nucleon. Lattice QCD simulations of the strong interactions between quarks and gluons can provide information on the momentum, spin and angular momentum of these particles within the nucleon. In general one distinguishes between elastic scattering processes where the nucleon is left intact and inelastic scattering where the nucleon is destroyed. Both aspects can be parameterized in terms of quark and gluon generalized parton distributions (GPDs). These will be measured at the proposed Electron Ion Collider (EIC) in the US. This project computes the moments of the GPDs, the so called generalised form factors. Disconnected contributions must be evaluated in order to access the moments for the individual quark flavours.

Principal Investigator: Andreas Schäfer, Institute for Theoretical Physics, Regensburg University (Germany)
HPC Platform: SuperMUC (LRZ) - Date published: January 2019 (pr74po, pr48gi, pr84qe)
More: Disconnected Contributions to Generalized Form Factors (GPDs) …

Conformational Dynamics in Alzheimer Peptide Formation and Amyloid Aggregation

Conformational Dynamics in Alzheimer Peptide Formation and Amyloid Aggregation

The generation and assembly of Aβ peptides into pathological aggregates is associated with neurodegenerative diseases including Alzheimer’s disease. Goal of this project was to better understand the dynamics of γ-secretase a key enzyme for the formation of Aβ peptides using large scale Molecular Dynamics simulations and how it associates with substrate molecules. Using the HPC system SuperMUC it was possible to characterize local and global motions of γ-secretase in atomic detail and how it is related to function. In addition, large scale simulations were employed to investigate the amyloid propagation mechanism at the tip of an already formed amyloid fragment. The kinetics and thermodynamics of the process were analyzed and compared to alternative amyloid secondary nucleation events.
  
Principal Investigator: Martin Zacharias, Lehrstuhl für Molekulardynamik, Physik-Department T38, Technische Universität München (Germany)
HPC Platform: SuperMUC (LRZ) - Date published: January 2019 (pr48po)
More: Conformational Dynamics in Alzheimer Peptide Formation and Amyloid Aggregation …

High-Resolution Ocean Modelling on Unstructured Meshes

High-Resolution Ocean Modelling on Unstructured Meshes

Results from high-resolution simulations with the sea ice-ocean model FESOM, formulated on unstructured meshes, are presented in which ocean eddies are resolved in the North Atlantic region. By resolving ocean eddies, these features are represented by the laws of physics rather than empirical rules of thumb, as done in most existing climate simulations. A comparison with satellite data suggests that the simulated eddy fields start to become indistinguishable from observations, showing that the model passes the climatic Turing Test. It is argued that these high-resolution resolution models have the potential to significantly increase our understanding of how the climate in general and the ocean in particular will be evolve in a warming world.

Principal Investigator: Prof. Dr. Thomas Jung, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research (AWI), (Germany)
HPC Platform: Hazel Hen (HLRS) - Date published: January 2019 (GCS-AWCM)
More: High-Resolution Ocean Modelling on Unstructured Meshes …

Large Eddy Simulations of Micro-Vortex Generators for Shock Wave/Turbulent Boundary Layer Interaction

Large Eddy Simulations of Micro-Vortex Generators for Shock Wave/Turbulent Boundary Layer Interaction

In this study, researchers in fluid mechanics at ISAE-SUPAERO investigate possible control of shock boundary layer interaction, a well known flow phenomenon occuring on high speed supersonic devices. In particular, low frequency modes have a significant impact on the device load. High fidelity simulations of turbulent flows are performed to understand the modifications of the flow field induced by the microramp vortex generators located upstream the interaction.

Principal Investigator: Julien Bodart, ISAE-SUPAERO, Université de Toulouse (France)
HPC Platform: JUQUEEN (JSC) - Date published: January 2019 (PRA097)
More: Large Eddy Simulations of Micro-Vortex Generators for Shock Wave/Turbulent Boundary Layer Interaction …

Towards Large-Eddy Simulation of Primary Atomization of Liquid Jets

Towards Large-Eddy Simulation of Primary Atomization of Liquid Jets

Primary goal of this project, run on HPC system SuperMUC of LRZ, was the establishing of a direct numerical simulation (DNS) data base of primary breakup of a liquid jet injected into stagnant air. Due to the wide range of time and length scales the development of a predictive large eddy simulation (LES) framework is highly desirable. However, the multiscale nature of atomization is challenging, as the presence of the phase interface causes additional subgrid scale terms to appear in the LES formalism. DNS provides fully resolved flow fields and flow statistics for a-priori subgrid scale analysis and a-posteriori LES validation.

Principal Investigators: Markus Klein and Sebastian Ketterl, Institute of Mathematics and Applied Computing, Bundeswehr University Munich (Germany)
HPC Platform: SuperMUC (LRZ) - Date published: January 2019 (pr48no)
More: Towards Large-Eddy Simulation of Primary Atomization of Liquid Jets …

Advanced Load Balancing for Complex Problems

Robust Massively Parallel Sorting

Sorting is one of the most fundamental and widely used algorithms. It can be used to build index data structures, e.g., for full text search or for various applications in bioinformatics. Sorting can also rearrange data for further processing. In particular, it is a crucial tool for load balancing in advanced massively simulations. The wide variety of applications means that we need fast sorting algorithms for a wide spectrum of situations. Researchers have developed massively parallel robust sorting algorithms, apply new load balancing techniques, and systematically explore the design space of parallel sorting algorithms.

Principal Investigator: Peter Sanders, Institute of Theoretical Informatics, Karlsruhe Institute of Technology (Germany)
HPC Platform: JUQUEEN (JSC) - Date published: December 2018 (hka17)
More: Robust Massively Parallel Sorting …

The ClimEx Project: Investigating Climate Variability to Study Extreme Events in a Warming World

The ClimEx Project: Investigating Climate Variability to Study Extreme Events in a Warming World

Hydrometeorological extremes, such as droughts and floods are one of the grand challenges of our future and pose great interest and concern for water management and public safety. Hence, the ClimEx project disaggregates the response of the climate system into changing anthropogenic forcing and natural variability by analyzing a novel large-ensemble of climate simulations, operated using High-Performance Computing. The comprehensive new dataset (CRCM5-LE) generated 50 transient independent and evenly likely realizations of the past and the future climate (1950-2099) over two large domains (Europe, Eastern North America) in high spatial (12km) and temporal (1h-1d) resolution. The resulting 7500 model years allow for a thorough analysis of extreme statistics and derivation of robust estimates of return values for hydrometeorological extreme events (e.g. floods) under current and future climate conditions.

Principal Investigator: Ralf Ludwig, Ludwig-Maximilians-Universität München (Germany)
HPC Platform: SuperMUC of LRZ - Date published: December 2018 (pr94lu)
More: The ClimEx Project: Investigating Climate Variability to Study Extreme Events in a Warming World …

Highly-Resolved Numerical Simulation of Combustion in Energy Conversion Processes

Highly-Resolved Numerical Simulation of Combustion in Energy Conversion Processes

Direct numerical simulation (DNS) has been applied to study the noise emitted by combustion processes. A highly efficient numerical tool based on the public domain code OpenFOAM has first been developed for DNS of chemically reacting flows, including detailed calculations of transport fluxes and chemical reactions. It has then be used to simulate different turbulent flame configurations to gain an insight into the flame-turbulence interaction, which represents the main noise generation mechanisms. Based on the DNS results, simple correlation models have been developed to predict combustion noise by means of unsteady heat release due to turbulent combustion.

Principal Investigator: Hening Bockhorn, Engler-Bunte-Institute/Combustion Technology, Karlruhe Institute of Technology (Germany)
HPC Platform: Hazel Hen (HLRS) - Date published: December 2018 (Cnoise)
More: Highly-Resolved Numerical Simulation of Combustion in Energy Conversion Processes …

Viscosity Estimate with Staggered Fermions

Viscosity Estimate with Staggered Fermions

Lattice QCD has played a crucial role in the determination of the true equation of state. It is a numerical approach to solve the theory of strong interactions, quantum chromodynamics (QCD), which provides first principles access to the physics of QGP. Lattice QCD assumes thermal equilibrium, where also the equation of state is defined. Researchers calculated this input to hydrodynamics in a succession of projects with the goal to investigate, whether such first principle determination of the (shear) viscosity parameter is possible from lattice QCD.
  
Principal Investigator: Szabolcs Borsanyi, University of Wuppertal (Germany)
HPC Platform: JUQUEEN of JSC - Date published: December 2018 (hwu30)
More: Viscosity Estimate with Staggered Fermions …

DNS of Turbulent Plane Couette Flow with Wall-normal Transpiration Velocity

Direct Numerical Simulation of Turbulent Plane Couette Flow with Wall-normal Transpiration Velocity

Channel flows are important references for studying turbulent phenomena in a simplified setting. The present project investigates Couette flow, i.e. channel flow driven by a moving wall. Although important to many practical applications, Couette flows have been studied considerably less than other canonical flows, for (a) the experimental setup is very complex, and (b) long and wide structures are present which are characteristic to Couette-type flows. This accounts for long and wide computational domains, which make direct numerical simulations of Couette flow expensive. Even by applying permeable boundary conditions, i.e. blowing from the lower and suction from the upper wall, the Couette-type structures could not be destroyed. Instead, new and unexpected structures close to the wall are observed in the spectra.

Principal Investigator: Martin Oberlack, TU-Darmstadt (Germany)
HPC Platform: SuperMUC of LRZ - Date published: December 2018 (pr92la)
More: Direct Numerical Simulation of Turbulent Plane Couette Flow with Wall-normal Transpiration Velocity …

Direct Numerical Simulation of Turbulent Flow Past an Acoustic Cavity Resonator

Direct Numerical Simulation of Turbulent Flow Past an Acoustic Cavity Resonator

A cavity in a turbulent gas flow often leads to an interaction of vortex structures and acoustics. By exploiting this interaction, in some applications sound can be suppressed: silencers for jet engines or exhausts. In other cases, sound can be equally produced: squealing of open wheel-bays, sunroof and window buffeting, noise of pipeline intersection and tones of wind instruments. Typically, in expansive experimental runs, various configurations are tested in order to fulfill the design objectives of the respective application. Based on a 'Direct Numerical Simulation', the aim is to improve the understanding of the interactions between turbulence and acoustics of cavity resonators and to develop standalone sound prediction models, which improve and simplify the design process.

Principal Investigator: Lewin Stein, Institut für Strömungsmechanik und Technische Akustik, Technische Universität Berlin (Germany)
HPC Platform: Hazel Hen of HLRS - Date published: Nov. 2018 (AcouTurb)
More: Direct Numerical Simulation of Turbulent Flow Past an Acoustic Cavity Resonator …

Colloids in Multiphase Flow

Colloids in Multiphase Flow

Particle-stabilised emulsions have long been studied for their unique properties, which have a number of different industrial applications. Leveraging the petascale computing power of JSC high-performance computing system JUQUEEN, scientists of the Eindhoven University of Technology have been using simulations to investigate these systems, the results of which are now being picked up by experimental groups and realised in practice.

Principal Investigator: Jens Harting, Eindhoven University of Technology (The Netherlands)
HPC Platform: JUQUEEN of JSC - Date published: November 2018 (COMFLOW)
More: Colloids in Multiphase Flow …

Fathoming the Processes inside Rocket Combustion ChambersAerodynamic Investigations of Vortex Dominated and Morphing Aircraft Configurations with Active and Passive Flow Control

Enhanced Aerodynamics of Wind Turbines

Researchers of the Institute of Aerodynamics and Gas Dynamics (IAG) at the University of Stuttgart investigate the aerodynamic behaviour of modern wind turbines by means of CFD, using the finite volume code FLOWer. The main topics of interest are the effects on the turbine loads caused by turbulent inflow conditions and their control by active trailing edge flaps, and the analysis of the complex flow around the nacelle. Additional studies are currently conducted regarding the effects of aero-elasticity and impact of complex terrain.

Principal Investigator: Thorsten Lutz, Institute of Aerodynamics and Gas Dynamics, University of Stuttgart (Germany)
HPC Platform: SuperMUC of LRZ - Date published: November 2018 (pr94va)
More: Enhanced Aerodynamics of Wind Turbines …

Fathoming the Processes inside Rocket Combustion ChambersAerodynamic Investigations of Vortex Dominated and Morphing Aircraft Configurations with Active and Passive Flow Control

Aerodynamic Investigations of Vortex Dominated and Morphing Aircraft Configurations with Active and Passive Flow Control

The project focuses on the one hand on the improvement of flow physics knowledge related to flow separation at highly swept wing leading-edges resulting in large scale vortical structures. The evolution and development of such leading-edge vortices along with inherent instability mechanisms are still hard to be correctly predicted by numerical simulations. Special attention is needed on turbulence modelling and scale resolving techniques enabling also flow control methodologies for such types of flow. On the other hand, aerodynamic features of elasto-flexible lifting surfaces have been studied.

Principal Investigator: Christian Breitsamter, Chair of Aerodynamics and Fluid Mechanics, Technical University of Munich (Germany)
HPC Platform: SuperMUC of LRZ - Date published: November 2018 (pr86fi)
More: Aerodynamic Investigations of Vortex Dominated and Morphing Aircraft Configurations with Active and Passive Flow Control …

Extreme-Scale Molecular Dynamics Simulation of Droplet Coalescence

Extreme-Scale Molecular Dynamics Simulation of Droplet Coalescence

The coalescence of nano-droplets is investigated using the highly optimized molecular dynamics software ls1 mardyn. Load balancing of the inhomogeneous vapor-liquid system is achieved through k-d trees, augmented by optimal communication patterns. Several solution strategies that are available to compute molecular trajectories on each process are considered, and the best strategy is automatically selected through an auto-tuning approach. Recent simulations that focused on large-scale homogeneous systems were able to leverage the performance of the entire Hazel Hen supercomputer, simulating for the first time more than twenty trillion molecules at a performance of up to 1.33 Petaflops.

Principal Investigator: Philipp Neumann, Scientific Computing group, Universität Hamburg (Germany)
HPC Platform: Hazel Hen (HLRS) - Date published: October 2018 (GCS-mddc)
More: Extreme-Scale Molecular Dynamics Simulation of Droplet Coalescence …

The search for the H dibaryon in lattice QCD

The Search for the H Dibaryon in Lattice QCD

All visible matter around us is made from nuclei, each consisting of protons and neutrons. One of the triumphs of 20th century particle physics is the realisation that protons and neutrons are made from even smaller building blocks, the so-called quarks, which are now regarded as the fundamental constituents of matter. Particles such as the proton and neutron (collectively referred to as baryons) are considered bound states of three quarks. The theory of Quantum Chromodynamics (QCD) describes with very high accuracy the forces that act between these elementary building blocks. However, it remains a great challenge to provide a quantitative description of particles such as the proton and nuclear matter in terms of the underlying interaction between quarks. In this project scientists study bound states of two baryons (so-called dibaryons) as prototypes of more complex systems such as light nuclei. The formulation of QCD on a space-time grid is employed, which makes the theory amenable to a numerical treatment. More specifically, the focus is on the so-called H dibaryon, whose existence has been predicted 40 years ago. These studies show that such a state may actually exist.
  
Principal Investigator: Hartmut Wittig, Institute for Nuclear Physics and PRISMA Cluster of Excellence, Johannes Gutenberg University of Mainz (Germany)
HPC Platform: JUQUEEN of JSC - Date published: October 2018 (hmz21)
More: The Search for the H Dibaryon in Lattice QCD …

Binary Neutron Star Merger Simulations

Binary Neutron Star Merger Simulations

The collision of two neutron stars is one of the most violent events in the Universe. The extreme conditions, with densities of about one hundred million tons per cubic centimeter and gravity hundred billion times that of Earth gravity, cannot be tested on Earth, which makes these events a perfect laboratory to study matter at extreme limits. Using advanced numerical relativity simulations, scientists study the phenomena close to the merger of the two neutron stars to extract information about the emitted gravitational wave and electromagnetic signals.

Principal Investigator: Tim Dietrich, Max Planck Institute for Gravitational Physics Potsdam (Germany)
HPC Platform: SuperMUC of LRZ - Date published: October 2018 (pr48pu)
More: Binary Neutron Star Merger Simulations …

MDS of Deformation Processes in Nanostructured Metallic Glasses

Molecular Dynamics Simulations of Deformation Processes in Nanostructured Metallic Glasses

Metallic glasses are very strong and nonetheless elastic, making them appealing for diverse engineering applications. Despite these favourable properties, the failure of metallic glasses sets in directly after the elastic limit, making them brittle. In this project, scientists at the Technische Universität Darmstadt investigate nanostructured metallic glasses as a possible solution to this problem using large-scale molecular dynamics simulations.

Principal Investigator: Karsten Albe, Technische Universität Darmstadt (Germany)
HPC Platform: JUQUEEN of JSC - Date published: October 2018 (hda22)
More: Molecular Dynamics Simulations of Deformation Processes in Nanostructured Metallic Glasses …

Global, convection-permitting climate modelling with the Model for Prediction Across Scales in the WCRP CORDEX Flagship Pilot Study

Global, Convection-Permitting Climate Modelling with the Model for Prediction Across Scales in the WCRP CORDEX Flagship Pilot Study

Using the Model for Prediction Across Scales (MPAS), four years of climate simulations at convection-permitting resolutions where carried out using a variable 30-3km resolution mesh, transitioning the so-called gray zone of convection around 5-10km. The comprehensive data set generated following the protocol of the CORDEX Flagship Pilot Study (FPS) on convection-permitting climate simulations will allow the CORDEX-FPS community to study the added value of global, variable-resolution simulations down to convective scales over traditional approaches employing regional climate models and/or coarse horizontal resolutions.

Principal Investigator: Dominikus Heinzeller, Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research, Garmisch-Partenkirchen (Germany)
HPC Platform: JUQUEEN of JSC - Date published: October 2018 (hka19)
More: Global, Convection-Permitting Climate Modelling with the Model for Prediction Across Scales in the WCRP CORDEX Flagship Pilot Study …

Theory of Mantle, Core, and Technological Materials

From Electrons to Planets

Without its magnetic field, life on Earth’s surface is impossible, since the magnetic field screens us from deadly solar radiation. In order to gain a better understanding of the generation of Earth’s magnetic field and heat flow in the Earth--which is crucial for understanding Earth's history--scientists have performed large scale simulations of crystalline and liquid iron alloys at conditions of Earth’s core, up to 6000K and over 300 million atmospheres of pressure, and have computed the electrical and thermal conductivity. The computationally very intensive first-principles molecular dynamics simulations for fluids required more than 60 million core hours of computing time on SuperMUC.

Principal Investigator: Ronald E. Cohen, Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität München (Germany)
HPC Platform: SuperMUC of LRZ - Date published: September 2018 (pr92ma)
More: From Electrons to Planets …

Preparing for the Imminent Detection of Gravitational Waves from Binary Neutron Stars

Preparing for the Imminent Detection of Gravitational Waves from Binary Neutron Stars

The age of multi-messenger gravitational wave astronomy has arrived. The simultaneous detection of gravitational and electromagnetic waves from merging neutron stars has illustrated the importance of having high resolution numerical relativity simulations, performed on SuperMUC, available to disentangle the complex interplay of nuclear physics, neutrino physics, and strong field gravity. Using these simulations, it is possible to study matter at densities unreachable with terrestrial experiments and determine the origin of the heavy elements in the universe.

Principal Investigator: Luciano Rezzolla, Institute for Theoretical Physics, Goethe University Frankfurt (Germany)
HPC Platform: SuperMUC of LRZ - Date published: September 2018 (pr62do)
More: Preparing for the Imminent Detection of Gravitational Waves from Binary Neutron Stars …

Global High-Resolution Earth Models - Generation and Assessment

Global High-Resolution Earth Models - Generation and Assessment

Much of what one refers to as geological activity of the Earth arises from convective processes within the Earth’s mantle that transport heat from the deep interior of our planet to the surface. One of the major challenges in the geosciences is to constrain the distribution and magnitude of the resulting vast forces that drive plate tectonics. Mantle flow also provides boundary conditions - thermal and mechanical - to other key elements of the Earth system (e.g., geodesy, geodynamo/geomagnetism). This makes fluid dynamic studies of the mantle essential to our understanding of how the entire planet works. In a long-term effort, scientists at the Ludwig-Maximilians-Universität München strive for improved computational models of the Earth's deep interior. To assess the quality of the models against Earth observations (e.g., geologic information) they run inverse models to track mantle flow back into the past.

Principal Investigator: Hans-Peter Bunge, Geophysics Section, Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität München (Germany)
HPC Platform: SuperMUC of LRZ - Date published: September 2018 (pr48ca)
More: Global High-Resolution Earth Models - Generation and Assessment …

Critical Collapse and the Dynamics of Strong Gravity

Critical Collapse and the Dynamics of Strong Gravity

General relativity describes the gravitational interaction as the curvature of spacetime. This involves complicated partial differential equations, and consequently extreme scenarios can be treated only by numerical simulations. In this project spacetimes close to the critical threshold of black hole formation were evolved on SuperMuc. These computations were performed using bamps, a new massively parallel code for numerical relativity. The spacetimes constructed constitute the most extreme regime imaginable - that in which cosmic censorship itself may be violated and the black hole singularity could be seen by distant observers.
  
Principal Investigators: David Hilditch and Bernd Brügmann, Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena (Germany)
HPC Platform: SuperMUC of LRZ - Date published: September 2018 (pr87nu)
More: Critical Collapse and the Dynamics of Strong Gravity …

CARo – Computational Aeroacoustics of Rotors

CARo – Computational Aeroacoustics of Rotors

Using state-of-the-art simulation technology for highly resolved computational fluid dynamics (CFD) solutions, the helicopter and aeroacoustics group at the Institute of Aerodynamics and Gasdynamics at the University of Stuttgart has simulated the complex aerodynamics, aeromechanics, and aeroacoustics of rotorcraft for years. By advancing the established flow solver FLOWer, which now integrates higher order accuracy and systematic concentration of spatial resolution in targeted regions, the IAG-based group was able to obtain results for complete helicopters at certification-relevant flight states within the variance of individual flight tests for the aerodynamic noise.

Principal Investigator: Manuel Keßler, Institut für Aerodynamik und Gasdynamik, Universität Stuttgart (Germany)
HPC Platform: Hazel Hen (HLRS) - Date published: July 2018 (GCS-CARo)
More: CARo – Computational Aeroacoustics of Rotors …