Global rainbow thermometry: improvements in the data inversion algorithm and validation technique in liquid-liquid suspension |
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Authors: | Vetrano Maria Rosaria van Beeck Jeronimus Petrus Antonius Johannes Riethmuller Michel Léon |
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Affiliation: | von Karman Institute for Fluid Dynamics, Chaussée de Waterloo 72, Rhode Saint Genèse B1640, Belgium. vetrano@vki.ac.be |
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Abstract: | 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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