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Fast and robust method for flow analysis using GPU assisted diffractive optical element based background oriented schlieren (BOS)
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DOI：10.1016/j.optlaseng.2019.105908.png)
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Abstract
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The paper introduces a method for studying flow dynamics using diffractive optical element based background oriented schlieren (BOS). Our method relies on fringe demodulation using root multiple signal classification technique which provides high robustness against noise. Further, a graphics processing unit (GPU) based implementation is proposed which offers significant improvement in computational efficiency, and thus enables high speed analysis of flows. The performance of the method is demonstrated via numerical simulations and the practical applicability is also shown by analyzing a diffusion phenomenon in liquids by BOS.
Keywords:
Background-oriented schlieren
Fringe projection
Fringe analysis
Phase retrieval
Liquid diffusion
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