6533b854fe1ef96bd12af570

RESEARCH PRODUCT

On the measurement of local gas hold-up, interfacial area and bubble size distribution in gas–liquid contactors via light sheet and image analysis: Imaging technique and experimental results

Antonio BusciglioAlberto BrucatoFranco GrisafiFrancesca Scargiali

subject

Work (thermodynamics)Materials scienceSettore ING-IND/25 - Impianti ChimiciGeneral Chemical EngineeringBubbleMixing (process engineering)Image processingIndustrial and Manufacturing EngineeringImagingPhysics::Fluid DynamicsOpticsGas-liquid dispersionContactorBubblebusiness.industryBUBBLESApplied MathematicsMIXINGMultiphase flowBUBBLE SIZE DISTRIBUTIONGeneral ChemistryMechanicsGas–liquid dispersionParticle image velocimetryMultiphase flowDispersion (chemistry)business

description

Abstract In this work a novel experimental technique for measuring local gas hold-up, interfacial area and bubble size distribution, in gas–liquid systems is proposed. The technique is based on advanced Image Processing coupled with experimental set-ups typically available for Particle Image Velocimetry. A fluorescent dye dissolved in the liquid phase allows to identify in-plane bubbles among all visible bubbles in the images. To this end, a suitable algorithm is proposed. The raw data so obtained are processed by previously developed statistical methods that result in a reliable reconstruction of actual dispersion properties. The technique is applied to the case of a gas-dispersed mechanically agitated vessel, and the data obtained are presented and discussed.

10.1016/j.ces.2013.08.029http://hdl.handle.net/11585/372663