Color contamination matrix property assessment for improvement of colored smoke PIV


  • Yuichi Murai Hokkaido University, Japan
  • Yasufumi Horimoto Hokkaido University, Japan
  • Hyun Jin Park Hokkaido University, Japan
  • Yuji Tasaka Hokkaido University, Japan



Color PIV, smoke PIV, 3-layer PIV, PPP higher than unity, wind tunnel experiment


A single-camera color PIV system that can acquire PIV data of three separated layers has been redesigned, purposing improvement of wind tunnel applicability. We target smoke image that has particle-per-pixel values higher than unity. The system constitutes of a high-power color-coding illuminator and a digital color high-speed video camera. RGB values in recorded image involves severe color contaminations due to five optical and digital sequences (Fig. 1). To quantify this, a snapshot calibration is proposed to describe the contamination matrix equation (Eq. (1)). Taking the inverse matrix (Eq. (2)) allows in-plane PIV in each color layer to be accurately implemented. We also derive mathematical limits to operate the colored smoke PIV, which is explained by the matrix property (Eq (3)). Feasibility of the proposed method has been demonstrated by application to a turbulent wake behind a Delta wing (Fig. 2) and also to a boundary layer flow along heated chocolate.

Author Biography

Yuichi Murai, Hokkaido University, Japan

1995 Ph.D, University of Tokyo, Japan
1996 Research associate, Fukui University, Japan
2000 Research fellow, Imperial College London, UK
2003 Associate Professor, Hokkaido University, Japab
2010 Professor, Hokkaido University, Japan






3D Methods and Applications