Abstract

The shape of droplets in liquid–liquid systems influences their mass and momentum transfer processes. The deviation from sphericity of rising droplets in liquid–liquid systems was investigated for different droplet sizes. Rainbow refractometry permits one to test, in this case, whether the use of laser-optical particle sizing will be correct or faulty. Since the assumption of spherical particle geometry is a general basis of laser-optical particle-sizing techniques such as rainbow refractometry or phase Doppler anemometry, deviation from the spherical shape results in a measuring error. A sphericity check based on rainbow refractometry is introduced.

© 1999 Optical Society of America

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