Christian F. Janßen

Author: Powerkiter

  • elbe live demo @ GACM 2013

    elbeVIS_2013_50ppi_web_text

  • elbe team @ GACM 2013

    The elbe team will present the latest advances in the field of visualization and fluid-structure interaction at the 5th GACM Colloquium on Computational Mechanics (GACM 2013):

    Monday, 15:20 – 15:40:
    Nagrelli, Heinrich: GPGPU-accelerated simulation of wave-ship interactions using LBM and a quaternion-based motion modeler

    Tuesday, 13:30 – 13:50
    Koliha, Nils: Efficient Grid Generation and On Device Visualization for Massively Parallel GPU Accelerated Lattice Boltzmann CFD Simulations

    Monday, 18:10, Poster Session
    Koliha, Nils: Efficient Grid Generation and On Device Visualization for Massively Parallel GPU Accelerated Lattice Boltzmann CFD Simulations (Poster/Live Demo)

    Moreover, this year’s symposium on Fluid Mechanics is organized by Christian Janßen and Thomas Rung (symposium #12, GACM web page). The symposium features 18 talks in four sessions on Hybrid Methods, the Lattice Boltzmann Method, Optimization, and FEM and ACM. It will take place on Tuesday and Wednesday from 10:30 to 12:10 and from 13:30 to 15:10 in building N, room 0.007 (campus map).

  • elbe

    During my last year at the Institute for Fluiddynamics and Ship Theory at TUHH, I worked on refactoring, extending and combining my previously written GPGPU codes into one single code framework. The result is

    elbe – the efficient lattice boltzmann environment

    from Hamburg. It features 1D, 2D and 3D Lattice-Boltzmann kernels for various different physics, from the depth-averaged one-dimensional shallow water equations to three-dimensional multiphase models. elbe has already been used in a couple of B.Sc. and M.Sc. projects and for teaching purposes. Further information on the code, a list of publications publications and a multimedia gallery is now available at

    http://www.tuhh.de/elbe

  • Testing the new GeForce GTX Titan

    We recently tested the new NVIDIA Kepler boards for our GPGPU flow solver elbe. After initial tests on the Kepler K20 boards were very promising and led to speed-up factors of up to 2.5x (without any code modifications), we decided to purchase the new GeForce GTX Titan board to see if the consumer hardware can keep up with the professional boards. This consumer card features 2688 streaming processors, 6 GB device memory and single- and double-precision compute capability.

    Running the elbe code for both 2D/3D and single/double precision calculations, we found a performance of up to 1.5 GNUPS (giga node updates per second), 2.5x more than on our recent Tesla C2075 GPGPUs, for a D2Q9 singlephase LBM calculation.

    Further reading:

    • http://www.nvidia.de/object/nvidia-kepler-de.html
    • http://www.nvidia.de/titan-graphics-card

  • ISOPE Abstracts accepted

    An improved two-phase Lattice Boltzmann model for high fluid density ratios: application to wave breaking

    Amir Banari, Christian F. Janßen, Stéphan T. Grilli
    Dept. Ocean Engineering, University of Rhode Island, USA.

    Three-dimensional numerical simulation of air-sea interaction with a coupled LB-point-particle approach

    Yackar Mauzole, Christian F. Janßen, Stephan T. Grilli, Tetsu Hara
    University of Rhode Island, USA.

    Numerical simulation of long wave propagation and run-up using a Lattice Boltzmann approach on GPGPU hardware

    Christian F. Janßen, Stéphan T. Grilli
    Dept. Ocean Engineering, University of Rhode Island, USA.

    Manfred Krafczyk
    Technische Universität Braunschweig, Germany.

    http://www.isope2012.org/

  • OE Seminar Talk Today!

    Ocean Engineering seminar talk today, join me:

    Modeling of complex free surface flows and wave-structure interactions using the Lattice Boltzman Method, Christian Janssen, PostDoc, Ocean Engineering

    http://www.oce.uri.edu/seminars.shtml