Measuring turbulence in reversing flows by particle image velocimeter

Methods of resolving directional ambiguity in PIV flow measurements are reviewed. Emphasis is given to the use of image shifting by mirror and laser pulse ''tagging''. Sample images obtained by these techniques are presented and the applicability and limitations of the image shifting approach are described.© (1990) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.