Computer Graphics
TU Braunschweig

Time-resolved 3D Capture of Non-stationary Gas Flows


Time-resolved 3D Capture of Non-stationary Gas Flows

Fluid simulation is one of the most active research areas in computer graphics. However, it remains difficult to obtain measurements of real fluid flows for validation of the simulated data. In this paper, we take a step in the direction of capturing flow dataFluid simulation is one of the most active research areas in computer graphics. However, it remains difficult to obtain measurements of real fluid flows for validation of the simulated data. In this paper, we take a step in the direction of capturing flow data

for such purposes. Specifically, we present the first time-resolved Schlieren tomography system for capturing full 3D, non-stationary gas flows on a dense volumetric grid. Schlieren tomography uses

2D ray deflection measurements to reconstruct a time-varying grid of 3D refractive index values, which directly correspond to physical properties of the flow. We derive a new solution for this reconstruction problem that lends itself to efficient algorithms that robustly work with relatively small numbers of cameras. Our physical system is easy to set up, and consists of an array of relatively low cost rolling-shutter camcorders that are synchronized with a new approach. We demonstrate our method with real measurements, and analyze precision with synthetic data for which ground truth information is available.


Author(s):Bradly Atcheson, Ivo Ihrke, Wolfgang Heidrich, Art Tevs, Derek Bradley, Marcus Magnor, Hans-Peter Seidel
Published:December 2008
Type:Article in conference proceedings
Book:Proc. SIGGRAPH Asia
Presented at:SIGGRAPH Asia
Note:art. 123


@inproceedings{atcheson20083dcapture,
  title = {Time-resolved 3D Capture of Non-stationary Gas Flows},
  author = {Atcheson, Bradly and Ihrke, Ivo and Heidrich, Wolfgang and Tevs, Art and Bradley, Derek and Magnor, Marcus and Seidel, Hans-Peter},
  booktitle = {Proc. {SIGGRAPH} Asia},
  volume = {27},
  number = {2},
  note = {art. 123},
  month = {Dec},
  year = {2008}
}

Authors

  • Bradly Atcheson

    External
  • Ivo Ihrke

    External
  • Wolfgang Heidrich

    External
  • Art Tevs

    External
  • Derek Bradley

    External
  • Marcus Magnor

    Director, Chair