Stephen Wood

Stephen Wood
NASA, Langley Research Center

Doctor of Philosophy Energy Science and Engineering

About

21
Publications
6,342
Reads
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190
Citations
Additional affiliations
May 2011 - May 2011
Oak Ridge National Laboratory
Position
  • Research Intern
May 2009 - August 2009
Oak Ridge National Laboratory
Position
  • Research Intern
October 2008 - May 2011
Florida International University
Position
  • Research Associate

Publications

Publications (21)
Technical Report
Full-text available
ScaLAPACK was rst released in 1995, 22 years ago. To put it in perspective, this was one year a er version 1.0 of the MPI standard was released, and two years before the OpenMP Fortran 1.0 speci cation was released. The fastest machine on the TOP500 list was the Japanese Numerical Wind Tunnel, with peak performance of 235.8 GFLOPS. This was the yea...
Article
Full-text available
Operating horizontal axis wind turbines create large-scale turbulent wake structures that affect the power output of downwind turbines considerably. The computational prediction of this phenomenon is challenging as efficient low dissipation schemes are necessary that represent the vorticity production by the moving structures accurately and that ar...
Article
Full-text available
The crucial components of a dynamically adaptive, parallel lattice Boltzmann method are described. By utilizing a level set approach for geometry embedding the method can handle rotating and moving structures effectively. The approach is validated for the canonical six degrees of freedom test case of a hinged wing. Subsequently, the wake field in a...
Conference Paper
Full-text available
The crucial components of a dynamically adaptive, parallel lattice Boltzmann method are described. By utilizing a level set approach for geometry embedding the method can handle rotating and moving structures effectively. The approach is validated for the canonical six degrees of freedom test case of a hinged wing. Subsequently, the wake field in a...
Chapter
Full-text available
The essential components of a parallel dynamically adaptive lattice Boltzmann method coupled to a 6-degree-of freedom rigid body motion solver are presented. This Cartesian approach with automatic fluid meshing is particularly well suited for simulating the interaction of low Reynolds number flows and moving structures with good accuracy and high c...
Conference Paper
The essential components of a parallel dynamically adaptive lattice Boltzmann method coupled to a 6-degree-of-freedom rigid body motion solver are presented. This Cartesian approach with automatic fluid meshing is particularly well suited for simulating the interaction of low Reynolds number flows and moving structures with good accuracy and high c...
Conference Paper
Full-text available
Operating horizontal axis wind turbines (HAWT) generate large-scale wake structures that can have considerable impact on downwind turbines. A HAWT exposed to vortices from upwind turbines generally produces reduced power and experiences increased structural vibrations that cause disproportionally accelerated material fatigue. Numerical simulation o...
Conference Paper
Full-text available
The essential components of a dynamically adaptive, parallel lattice Boltz-mann method particularly tailored for coupled wind engineering are described. By utilizing a level set approach for geometry embedding the method can handle rotating and moving structures effectively and is thereby genuinely suited for fluid-structure coupling problems invol...
Conference Paper
Full-text available
We have developed a finite volume based dynamically adaptive Lattice Boltzmann method for large eddy simulation of weakly compressible flows in moving complex geometry. The scheme is implemented as a patch solver within the massively parallel block-structured AMR framework AMROC. We will report on details of the method and first scalability results...
Article
Full-text available
We pursue a level set approach to couple an Eulerian shock-capturing fluid solver with space–time refinement to an explicit solid dynamics solver for large deformations and fracture. The coupling algorithms considering recursively finer fluid time steps as well as overlapping solver updates are discussed. Our ideas are implemented in the AMROC adap...

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