Journal article
Assessment of tomographic PIV in wall-bounded turbulence using direct numerical simulation data
CM De Silva, R Baidya, M Khashehchi, I Marusic
Experiments in Fluids | Published : 2012
Abstract
Simulations of tomographic particle image velocimetry (Tomo-PIV) are performed using direct numerical simulation data of a channel flow at Reynolds number of Re τ = 934, to investigate the influence of experimental parameters such as camera position, seeding density, interrogation volume size and spatial resolution. The simulations employ camera modelling, a Mie scattering illumination model, lens distortion effects and calibration to realistically model a tomographic experiment. Results are presented for camera position and orientation in three-dimensional space, to obtain an optimal reconstruction quality. Furthermore, a quantitative analysis is performed on the accuracy of first and secon..
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Funding Acknowledgements
The simulations performed in this study can be expanded to assess PIV experiments for various types of flows by applying the appropriate DNS data to the synthetic volume. Additionally, simulations can be performed to assess both two-dimensional and stereoscopic-PIV experimental parameters in a similar methodology as described in this paper to asses these techniques for wall-bounded turbulent flows. The authors wish to gratefully thank Prof. R.D. Moser for making the Re<INF>tau</INF> = 934, DNS data available, and the financial support of the Australian Research Council.