Self-organized feature map of particle image for flow measurement

Yuhai Chen; Allen T. Chwang

doi:10.1117/12.279734

21 November 1997 Self-organized feature map of particle image for flow measurement

Yuhai Chen, Allen T. Chwang

Proceedings Volume 3172, Optical Technology in Fluid, Thermal, and Combustion Flow III; (1997) https://doi.org/10.1117/12.279734
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

Self-organized feature map algorithm and the classical particle tracking technique have been adopted together to analyze the single-exposure double-frame particle images for flow measurement. Similar to the normal correlation technique in PIV, the whole region is divided into many small interrogation spots. Instead of applying the correlation algorithm to each of these spots to get their rigid translation, the self-organized feature map algorithm is used to compress the information such that every spot is represented by three coded equivalent particles.After tracking these three particle, a linear distributed velocity function can be obtained at every spot. The spot can contain ont only translation,but also rotation, shear and expansion while there is only rigid translation in the spot assumed in the commonly used correlation method. In addition to the theoretical explanation, the suggested method has been verified by a number of digital flow fields which have randomly distributed synthetic particles.

Citation Download Citation

Yuhai Chen and Allen T. Chwang "Self-organized feature map of particle image for flow measurement", Proc. SPIE 3172, Optical Technology in Fluid, Thermal, and Combustion Flow III, (21 November 1997); https://doi.org/10.1117/12.279734

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