Verfahren zur zeitaufgelösten Aufnahme der dreidimensionalen Dichteverteilung in instationären Strömungen mit Hilfe von Multi-Video Hintergrund-Schlieren Aufnahmen

• Applicant: Professor Dr.-Ing. Marcus Magnor
• Subject Area: Fluid Mechanics
• Term: from 2008 to 2011
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 67458658

• Final Report Year: 2010

Final Report Abstract

The goal of this project was to develop methods for reconstructing the time-varying, 3D density distributions in nonstationary gas flows, based on measuring the variations of the index of refraction using the background-oriented Schlieren (BOS) approach. To achieve this goal we have implemented a pixel-resolution BOS acquisition technique based on optical flow, developed a simplified procedure for capturing multi-video BOS data of nonstationary flows and contributed a tomographic reconstruction algorithm using a voxelized grid that requires considerably less BOS data. We validated the presented contributions with a rendering-based synthetisation method.

Publications

• Timeresolved 3D Capture of Non-stationary Gas Flows. ACM Transactions on Graphics (Proc. SIGGRAPH Asia), 27(5), 2008
  Atcheson, Bradley, Ivo Ihrke, Wolfgang Heidrich, Art Tevs, Derek Bradley, Marcus Magnor und Hans-Peter Seidel
  
• Tomographic 4D Reconstruction of Gas Flows in the Presence of Occluders. In: Proc. Vision, Modeling, and Visualization (VMV'09), Braunschweig, Germany, 11 2009
  Berger, Kai, Bradley Atcheson, Ivo Ihrke, Wolfgang Heidrich und Marcus Magnor
  
• Tomographic Reconstruction and Efficient Rendering of Refractive Gas Flows. 2009
  Ihrke, Ivo , Kai Berger, Bradley Atcheson, Marcus Magnor und Wolfgang Heidrich