Marcelo Marinho,  Valentin Obac Roda,  Paulo Seleghim Jr.. 

Probes are widely used in the study of multiphase systems, such as gas-liquid flows and fluidized beds, for improving the performance of industrial applications like distillation and fermentation columns. The problem consists in determining bubble size histograms from measured chords which may becritical due to large amount of noise in probe signal. This paper proposes a method of imagesacquisition and filtering for the determination of bubble size from images extracted from a standardvideo camera using a flash strobe.

http://www.lbd.dcc.ufmg.br/colecoes/wvc/2005/0028.pdf

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