Phase discrimination method for simultaneous two-phase separation in time-resolved stereo PIV measurements
| Autor: | Y. Cheng, F. J. Diez, Stamatios Pothos |
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| Rok vydání: | 2010 |
| Předmět: |
Fluid Flow and Transfer Processes
Jet (fluid) business.industry Computer science Fast Fourier transform Computational Mechanics General Physics and Astronomy Stereoscopy Image processing Filter (signal processing) law.invention Optics Particle image velocimetry Mechanics of Materials law Digital image processing Computer vision Artificial intelligence business Digital filter |
| Zdroj: | Experiments in Fluids. 49:1375-1391 |
| ISSN: | 1432-1114 0723-4864 |
| DOI: | 10.1007/s00348-010-0878-0 |
| Popis: | A phase discrimination method for two-phase PIV is presented that is capable of simultaneously separating the two phases from time-resolved stereoscopic PIV images taken in a particle-laden jet. The technique developed expands on previous work done by Khalitov and Longmire (Exp Fluids 32:252–268, 2002), where by means of image processing techniques, a raw two-phase PIV image can be separated into two single-phase images according to particle size and intensity distributions. The technique is expanded through the use of three new image processing algorithms to separate particles of similar size (up to an order of magnitude better than published work) for fields of view much larger than previously considered. It also addresses the known problem of noisy background images produced by high-speed CMOS cameras, which makes the particle detection and separation from the noisy background difficult, through the use of a novel fast Fourier transform background filter. |
| Databáze: | OpenAIRE |
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