Simulating PIV/BOS experiments with Ray Tracing
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Simulating PIV/BOS experiments with Ray Tracing

We present a ray tracing image generation methodology for rendering realistic images of particle image velocimetry (PIV) and background oriented schlieren (BOS) experiments in the presence of density/refractive index gradients. This methodology enables the simulation of experiments for experimental design, error, and uncertainty analysis. Images are generated by emanating light rays from the particles or dot pattern, and propagating them through the density gradient field and the optical elements, up to the camera sensor. The rendered images are realistic, and can replicate the features of a given experimental setup, for example, optical aberrations and perspective effects, which can be deliberately introduced for error analysis. An implementation of the proposed methodology in a Python-CUDA program is made available as an open source software for researchers. 

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