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Appl Opt. 2004 Jun 20;43(18):3600-7.

Global rainbow thermometry: improvements in the data inversion algorithm and validation technique in liquid-liquid suspension.

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von Karman Institute for Fluid Dynamics, Chaussée de Waterloo 72, Rhode Saint Genèse B1640, Belgium.


Improvements on the validation of a nonintrusive laser-based measurement technique are presented. This new technique, called global rainbow thermometry (GRT), is capable of determining the temperature and the size distributions of liquid droplets dispersed in a liquid or gaseous bulk. We propose a new data inversion algorithm that takes into account the whole rainbow pattern. Experimental validation of the GRT technique is performed for a liquid-liquid suspension. We performed the validation by comparing the measurements obtained with the GRT technique for the mean droplet temperature and size with the results obtained with alternative techniques.

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