Acceleration of Tomo-PIV by estimating the initial volume intensity distribution
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Tomographic particle image velocimetry (Tomo-PIV) is a promising new PIV technique. However, its high computational costs often make time-resolved measurements impractical. In this paper, a new preprocessing method is proposed to estimate the initial volume intensity distribution. This relatively inexpensive “first guess” procedure significantly reduces the computational costs, accelerates solution convergence, and can be used directly to obtain results up to 35 times faster than an iterative reconstruction algorithm (with only a slight accuracy penalty). Reconstruction accuracy is also assessed by examining the errors in recovering velocity fields from artificial data (rather than errors in the particle reconstructions themselves).
KeywordsParticle Image Velocimetry Seeding Density Camera Angle Ghost Particle Tomographic Particle Image Velocimetry
The first author wishes to acknowledge funding from the Engineering and Physical Sciences Research Council, through a Cambridge University Doctoral Training Award.
- Elsinga G, Kuik D, van Oudheusden B, Scarano F (2007) Investigation of the three-dimensional coherent structures in a turbulent boundary layer with Tomographic-PIV. In: 45th AIAA Aerospace Sciences Meeting and Exhibit, Reno, NevadaGoogle Scholar
- Maas H, Gruen A, Papantoniou D (2004) Particle tracking velocimetry in three-dimensional flows. Exp Fluids 15:133–146Google Scholar
- Schröder A, Geisler R, Elsinga G, Scarano F, Dierksheide U (2006) Investigation of a turbulent spot using time-resolved tomographic PIV. In: 13th international symposium on applications of laser techniques to fluid mechanics, Lisbon, PortugalGoogle Scholar
- Wieneke B, Taylor S (2006) Fat-sheet PIV with computation of full 3D-strain tensor using tomographic reconstruction. In: 13th international symposium on applications of laser techniques to fluid mechanics, Lisbon, PortugalGoogle Scholar
- Worth N, Nickels T (2007) A computational study of tomographic reconstruction accuracy and the effects of particle blocking. In: 5th joint ASME/JSME fluids engineering conference, San DiegoGoogle Scholar