Numerical simulation and immersive visualization of hairpin vortices.

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To better understand the vortex dynamics of coherent structures in turbulent and transitional boundary layers, we consider direct numerical simulation of the interaction between a flat-plate-boundary-layer flow and an isolated hemispherical roughness element. Of principal interest is the evolution of hairpin vortices that form an interlacing pattern in the wake of the hemisphere, lift away from the wall, and are stretched by the shearing action of the boundary layer. Using animations of unsteady three-dimensional representations of this flow, produced by the vtk toolkit and enhanced to operate in a CAVE virtual environment, we identify and study several key features in ... continued below

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16 pages

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Tufo, H.M.; Fischer, P.F.; Papka, M.E. & Blom, K. August 28, 1999.

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Description

To better understand the vortex dynamics of coherent structures in turbulent and transitional boundary layers, we consider direct numerical simulation of the interaction between a flat-plate-boundary-layer flow and an isolated hemispherical roughness element. Of principal interest is the evolution of hairpin vortices that form an interlacing pattern in the wake of the hemisphere, lift away from the wall, and are stretched by the shearing action of the boundary layer. Using animations of unsteady three-dimensional representations of this flow, produced by the vtk toolkit and enhanced to operate in a CAVE virtual environment, we identify and study several key features in the evolution of this complex vortex topology not previously observed in other visualization formats.

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16 pages

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  • Supercomputing 1999, Portland, OR (US), 11/13/1999--11/19/1999; Other Information: PBD: 28 Aug 1999

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  • Report No.: ANL/MCS/CP-99927
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 775255
  • Archival Resource Key: ark:/67531/metadc716647

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  • August 28, 1999

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  • Sept. 29, 2015, 5:31 a.m.

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  • March 23, 2016, 10:47 a.m.

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Tufo, H.M.; Fischer, P.F.; Papka, M.E. & Blom, K. Numerical simulation and immersive visualization of hairpin vortices., article, August 28, 1999; Illinois. (digital.library.unt.edu/ark:/67531/metadc716647/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.