Lehrstuhlberichte


2016
Bauer, Simon; Mohr, Marcus; Rüde, Ulrich; Weismüller, Jens; Wittmann, Markus; Wohlmuth, Barbara A two-scale approach for efficient on-the-fly operator assembly in massively parallel high performance multigrid codes Download
Pande, Jayant; Pickl, Kristina; Trosman, Oleg; Rüde, Ulrich; Smith, Ana-Suncana Microswimming with inertia Download
Gmeiner, Björn; Drziska, Daniel; Rüde, Ulrich; Scheichl, Robert; Wohlmuth, Barbara Scheduling massively parallel multigrid for multilevel Monte Carlo methods Download
Huber, Markus; Rüde, Ulrich; Waluga, Christian; Wohlmuth, Barbara Highly sparse surface couplings for subdomain-wise isoviscous Stokes finite element discretizations Download
Pickl, Kristina; Pande, Jayant; Köstler, Harald; Smith, Ana-Suncana; Rüde, Ulrich When do microswimmers exit the Stokes regime? Download
Rüde, Ulrich; Willcox, Karen; Curfman McInnes, Lois; De Sterck, Hans; Bungartz, Hans; Corones, James; Cramer, Evin; Crowley, James; Ghattes, Omar; ... Research and Education in Computational Science and Engineering Download
2015
Malas, Tareq M.; Hornich, Julian; Hager, Georg; Ltaief, Hatem; Pflaum, Christoph; Keyes, David E. Optimization of an electromagnetics code with multicore wavefront diamond blocking and multi-dimensional intra-tile parallelization Download
Gmeiner, Björn; Huber, Markus; John, L.; Rüde, Ulrich; Wohlmuth, Barbara A quantitative performance analysis for Stokes solvers at the extreme scale Download
Bogner, Simon; Rüde, Ulrich; Harting, Jens Curvature estimation from a volume of fluid indicator function for the simulation of surface tension and wetting with a free surface lattice Boltzmann method Download
Fattahi, Ehsan; Waluga, Christian; Wohlmuth, Barbara; Rüde, Ulrich; Manhart, Michael; Helmig, Rainer Pore-scale lattice Boltzmann simulation of laminar and turbulent flow through a sphere pack Download
Schornbaum, Florian; Rüde, Ulrich Massively Parallel Algorithms for the Lattice Boltzmann Method on Non-uniform Grids Download
Huber, Markus; John, Lorenz; Pustejovska, Petra; Rüde, Ulrich; Waluga, Christian; Wohlmuth, Barbara Solution Techniques for the Stokes System: A priori and a posteriori modifications, resilient algorithms (accepted for publication in SPPEXA Proceedings) Download
2014
Lengauer, C.; Apel, S.; Bolten, M.; Größlinger, A.; Hannig, Frank; Köstler, Harald; Rüde, Ulrich; Teich, Jürgen; Grebhahn, A.; Kronawitter, S.; Kuc... ExaStencils: Advanced Stencil-Code Engineering - First Project Report Download
Schruff, T.; Schornbaum, Florian; Godenschwager, Christian; Rüde, Ulrich; Frings, R.M.; Schüttrumpf, H. Numerical Simulation Of Pore Fluid Flow And Fine Sediment Infiltration Into The Riverbed Download
2013
Gmeiner, Björn; Gradl, Tobias; Gaspar, F.; Rüde, Ulrich Optimization of the Multigrid-Convergence Rate on Semi-structuresd Meshes by Local Fourier Analysis Download
Kuckuk, Sebastian; Köstler, Harald A Framework for Interactive Physical Simulations on Remote HPC Clusters Download
2012
Hertel, Kai; Pflaum, Christoph Abschlussbericht für das Projekt LightWave Download
Bogner, Simon; Rüde, Ulrich Liquid-gas-solid flows with lattice Boltzmann: Simulation of floating bodies Download
Gmeiner, Björn; Mohr, Marcus; Rüde, Ulrich Hierarchical Hybrid Grids for Mantle Convection - A First Study Download
Renker, L.-C.; Köstler, Harald Multikulturalität in Studiengängen - Chancen und herausforderungen für die Teamarbeit Download
2011
Pflaum, Christoph Abschlussbericht zum Innonet Projekt SOL: Simulation und Optimierung innovativer Lasersysteme Download
Preclik, Tobias; Rüde, Ulrich Solution Existence and Non-Uniqueness of Coulomb Friction Download
Keyes, D.; Mc Innes, L.C.; Woodward, C.; Gropp, W.D.; Myra, E.; Pernice, M.; Bell, J.; Brown, J.; Clo, A.; Connors, J.; Constantinescu, E.; Estep, ... Multiphysics Simulations: Challenges and Opportunities Download
Gmeiner, Björn; Gradl, Tobias; Köstler, Harald; Rüde, Ulrich Analysis of a flat Highly Parallel Geometric Multigrid Algorithm for Hierarchical Hybrid Grids Download
Werner, Johannes; Pflaum, Christoph An Improved and Automated Algorithm to Approximate Thermal Lensing in Solid-state Lasers Using Parabolic Fits Download
Popa, Constantin; Preclik, Tobias; Rüde, Ulrich Iterative Regularized Solution of Symmetric and Positive Semi-Definite Linear Complementarity Problems Download
2010
Buwa, Vivek; Donath, Stefan; Rabha, Swapna; Rüde, Ulrich Lattice Boltzmann simulation of bubbly flows: First results of experimental verification and comparison with Volume of Fluid model Download
Popa, Constantin; Preclik, Tobias Iterative Solution of Weighted Least Squares Problems with Applications to Rigid Multibody Dynamics Download
Preclik, Tobias; Rüde, Ulrich Elastic Collisions in Compementarity-based Time-stepping Methods Download
Preclik, Tobias; Rüde, Ulrich; Popa, Constantin Resolving Ill-posedness of Rigid Multibody Dynamics Download
Popa, Constantin; Preclik, Tobias; Köstler, Harald; Rüde, Ulrich Some projection-based direct solvers for general linear systems of equations Download
Stürmer, Markus; Rüde, Ulrich A framework that supports in writing performance-optimized stencil-based codes Download
Götz, Jan; Iglberger, Klaus; Feichtinger, Christian; Rüde, Ulrich Simple Techniques to improve Fluid Structure Interaction Methods in waLBerla Download
Feichtinger, Christian; Habich, Johannes; Köstler, Harald; Hager, Georg; Rüde, Ulrich; Wellein, Gerhard A Flexible Patch-Based Lattice Boltzmann Parallelization Approach for Heterogeneous GPU-CPU Clusters Download
Iglberger, Klaus; Rüde, Ulrich The Logging Functionality of the pe Physics Engine Download
Feichtinger, Christian; Donath, Stefan; Köstler, Harald; Götz, Jan; Rüde, Ulrich WaLBerla: HPC Software Design for Computational Engineering Simulations Download
2009
Nicola, A; Popa, Constantin; Rüde, Ulrich Projection algorithms with correction Download
Götz, Jan; Iglberger, Klaus; Feichtinger, Christian; Donath, Stefan; Deserno, Frank; Rüde, Ulrich Comparing strategies for parallelizing large scale fluid structure interaction using lattice Boltzmann methods and a physics engine Download
Wienands, Roman; Köstler, Harald On the Construction of Prolongation Operators in Multigrid Download
Thekale, Alexander; Gradl, Tobias; Klamroth, K.; Rüde, Ulrich Optimizing the number of multigrid cycles in the full multigrid algorithm Download
Nicola, A; Popa, Constantin; Rüde, Ulrich On a regularization technique for Kovarik-like approximate orthogonalization algorithms Download
Deserno, Frank; Iglberger, Klaus; Feichtinger, Christian; Götz, Jan; Donath, Stefan; Mihoubi, Cherif; Rüde, Ulrich A geometry tool for waLBerla Download
Iglberger, Klaus; Rüde, Ulrich A C++ Container for Pointers to Polymorphic Objects Download
Götz, Jan; Donath, Stefan; Feichtinger, Christian; Rüde, Ulrich Single Node Performance and Weak Scaling of waLBerla on Current Supercomputing Platforms Download
Iglberger, Klaus; Rüde, Ulrich The Math Library of the pe Physics Engine - Combining Smart Expression Templates and BLAS Efficiency Download
Ritter, Daniel; Rüde, Ulrich Efficient hierarchical grid coarsening for the open Poisson problem Download
Iglberger, Klaus; Rüde, Ulrich The pe Rigid Multi-Body Physics Engine Download
Iglberger, Klaus; Rüde, Ulrich C++ Design Patterns: The Sandwich Pattern Download
Iglberger, Klaus; Rüde, Ulrich Setup of Large-Scale Rigid Multibody Simulations with the pe Physics Engine Download
Iglberger, Klaus; Rüde, Ulrich C++ Compile Time Constraints Download
Bartuschat, D.; Borsdorf, Anja; Köstler, Harald; Rubinstein, R.; Stürmer, Markus A parallel K-SVD implementation for CT image denoising Download
Donath, Stefan; Feichtinger, Christian; Götz, Jan; Deserno, Frank; Iglberger, Klaus; Mihoubi, Cherif; Rüde, Ulrich waLBerla: On Implementation Details of a Localized Parallel Algorithm for Bubble Coalescence Download
Bogner, S.; Donath, Stefan; Feichtinger, Christian; Rüde, Ulrich waLBerla: Visualization of Fluid Simulation Data with POV-Ray Download
Preclik, Tobias; Köstler, Harald Multigrid HowTo: An Open Source Algebraic Multigrid Solver in C` Download
Iglberger, Klaus; Rüde, Ulrich Massively Parallel Rigid Multi-Body Dynamics Download
2008
Feichtinger, Christian; Götz, Jan; Donath, Stefan; Iglberger, Klaus; Rüde, Ulrich waLBerla: Exploiting Massively Parallel Systems Download
Thürey, Nils; Rüde, Ulrich Stable free surface Flows with the Lattice Boltzmann method on adaptively coarsened grids Download
Köstler, Harald Multigrid HowTo: A simple Multigrid solver in C++ in less than 200 lines of code Download
2007
Donath, Stefan; Götz, Jan; Feichtinger, Christian; Iglberger, Klaus; Bergler, Silke; Rüde, Ulrich On the Resource Requirements of the Hyper-Scale waLBerla Project Download
Popa, Constantin; Rüde, Ulrich Algebraic multigrid for general inconsistent linear systems: theoretical and experimental aspects Download
Köstler, Harald; Stürmer, Markus; Freundl, Christoph; Rüde, Ulrich PDE based Video Compression in Real Time Download
Popa, Constantin A hybrid Kaczmarz - Conjugate Gradient algorithm Download
Gradl, Tobias; Freundl, Christoph; Rüde, Ulrich Scalability on All Levels for Ultra-Large Scale Finite Element Calculations Download
Douglas, C.C.; Rüde, Ulrich; Hu, J.; Bittencourt, M.L. A Guide to Designing Cache Aware Multigrid Algorithms Download
Götz, Jan; Donath, Stefan; Feichtinger, Christian; Iglberger, Klaus; Rüde, Ulrich Concepts of waLBerla Prototype 0.0 Download
Stürmer, Markus; Götz, Jan; Richter, Gregor; Rüde, Ulrich Blood Flow Simulation on the Cell Broadband Engine Using the Lattice Boltzmann Method Download
Köstler, Harald; Münch, Patrick Videocoding using a variational approach for decompression Download
Heubeck, Britta; Pflaum, Christoph; Steinle, G. New Finite Elements for Large-Scale Simulation of Optical Waves Download
Feichtinger, Christian; Götz, Jan; Donath, Stefan; Iglberger, Klaus; Rüde, Ulrich Concepts of waLBerla Prototype 0.1 Download
Köstler, Harald; Ruhnau, K.; Wienands, R. Multigrid solution of the optical flow system using a combined diffusion and curvature based regularizer Download
Gradl, Tobias; Rüde, Ulrich Massively Parallel Multilevel Finite Element Solvers on the Altix 4700 Download
Stürmer, Markus; Köstler, Harald; Rüde, Ulrich A fast full multigrid solver for applications in image processing Download
2006
Härdtlein, Jochen; Linke, Alexander; Pflaum, Christoph Blocking Techniques with Fast Expression Templates Download
Härdtlein, Jochen; Linke, Alexander; Pflaum, Christoph Fast Expression Templates - Enhancements for High Performance C++ Libraries Download
Popa, Constantin Algebraic multigrid for general inconsistent linear systems: Preliminary results Download
Popa, Constantin Kovarik-like algorithms for Tikohonov regularization of dense inverse problems Download
Thürey, Nils; Rüde, Ulrich; Stamminger, Marc Animation of Large Scale Open Water Phenomena Download
Köstler, Harald; Möller, Christian; Deserno, Frank Performance Results for Optical Flow on an Opteron Cluster Using a Parallel 2D/3D Multigrid Solver Download
Götz, Jan Simulation of bloodflow in aneurysms using the Lattice Boltzmann method and an adapted data structure Download
Köstler, Harald; Popa, Constantin; Rüde, Ulrich Algebraic multigrid for general inconsistent linear systems: The correction step Download
2005
Mohr, Marcus; Popa, Constantin; Rüde, Ulrich A Kovarik Type-Algorithm without Matrix Inversion for the Numerical Solution of Symmetric Least-Squares Problems Download
Fabricius, Uwe; Freundl, Christoph; Köstler, Harald; Rüde, Ulrich High Performance Computing Education for Students in Computational Engineering Download
Thürey, Nils; Rüde, Ulrich; Körner, Carolin Interactive Free Surface Fluids with the Lattice Boltzmann Method Download
Thürey, Nils; Rüde, Ulrich Turbulent Free Surface Flows with the Lattice Boltzmann Method on adaptively coarsened grids Download
Popa, Constantin; Zdunek, Rafal Regularized ART with Gibbs Priors for Tomographic Image Reconstruction Download
Bergen, Benjamin; Hülsemann, Frank; Rüde, Ulrich Is 1.7x10^10^ Unknowns the Largest Finite Element System that Can Be Solved Today? Download
Köstler, Harald; Christadler, Iris; Rüde, Ulrich Robust and efficient multigrid techniques for the optical flow problem using different regularizers Download
2004
Körner, Carolin; Pohl, Thomas; Rüde, Ulrich; Thürey, Nils; Hofmann, Torsten FreeWiHR --- LBM with Free Surfaces Download
Köstler, Harald; Rüde, Ulrich Accurate Techniques for Computing Singular Solutions of Elliptic Problems Download
Freundl, Christoph; Bergen, Benjamin; Hülsemann, Frank; Rüde, Ulrich Expression Templates and Advanced PDE Software Design on the Hitachi SR8000 Download
Kowarschik, Markus; Christadler, Iris; Rüde, Ulrich Towards Cache-Optimized Multigrid Using Patch-Adaptive Relaxation Download
Schmid, Rochus; Köstler, Harald; Rüde, Ulrich Multigrid Accelerated Poisson-Solver for ab initio Moleculardynamic Applications Download
Fabricius, Uwe Comparison of two implementations of AMG-preconditioned CG considering an electrostatic problem Download
Kalmoun, El Mostafa; Köstler, Harald; Rüde, Ulrich Parallel multigrid computation of the 3D optical flow Download
Pohl, Thomas; Thürey, Nils; Deserno, Frank; Rüde, Ulrich; Lammers, Peter; Wellein, Gerhard; Zeiser, Thomas Performance Evaluation of Parallel Large-Scale Lattice Boltzmann Applications on Three Supercomputing Architectures Download
2003
Linke, Alexander; Pflaum, Christoph Fast Expression Templates for the Hitachi SR8000 Supercomputer Download
Pohl, Thomas; Kowarschik, Markus; Wilke, Jens; Iglberger, Klaus; Rüde, Ulrich Optimization and Profiling of the Cache Performance of Parallel Lattice Boltzmann Codes in 2D and 3D Download
Bergen, Benjamin; Hülsemann, Frank Hierarchical hybrid grids: A framework for efficient multigrid on high performance architectures Download
Mohr, Marcus; Popa, Constantin; Rüde, Ulrich An Iterative Algorithm for Approximate Orthogonalisation of Symmetric Matrices Download
Popa, Constantin; Zdunek, Rafal Kaczmarz Extended Algorithm for Tomographical Image Reconstruction from Limited-Data Download
Mohr, Marcus; Popa, Constantin; Rüde, Ulrich Numerical Solution of Least-Squares Problems by a Modified Kovarik Algorithm Download
Pelican, Elena; Popa, Constantin Some Remarks on a Collocation Method for First Kind Integral Equations Download
Wilke, Jens; Pohl, Thomas; Kowarschik, Markus; Rüde, Ulrich Cache Performance Optimizations for Parallel Lattice Boltzmann Codes in 2D Download
Kalmoun, El Mostafa; Rüde, Ulrich A variational multigrid for computing the optical flow Download
2002
Altmann, K.; Pflaum, Christoph; Seider, D. 3D Finite Element Approximation of the Resonator Equation in Laser Simulation Download
Kowarschik, Markus; Weiß, Christian Cache Performance Tuning of Numerically Intensive Codes Download
Weiß, Christian; Hellwagner, Herrmann; Rüde, Ulrich; Stals, Linda Data Locality Optimizations to Improve the Efficiency of Multigrid Methods Download
2001
Pflaum, Christoph; Falgout, Robert Automatic Parallelization With Expression Templates Download
Mohr, Marcus Comparison of Solvers for a Bioelectric Field Problem Download
Karl, Wolfgang; Kowarschik, Markus; Rüde, Ulrich; Weiß, Christian DiMEPACK - A Cache-Aware Multigrid Library: User Manual Download
2000
Pflaum, Christoph Subdivision of Boundary Cells in 3D Download
Hülsemann, Frank; Kowarschik, Markus; Mohr, Marcus; Pfänder, Harald Performance Evaluation of a PIII-Quad-Board Download
1999
Mohr, Marcus; Popa, Constantin; Rüde, Ulrich An experimental analysis of a differential inverse problem Download
1998
Mohr, M.; Rüde, Ulrich Communication Reduced Parallel Multigrid: Analysis and Experiments Download