Experimental investigation on interactions among fluid and rod-like particles in a turbulent pipe jet by means of particle image velocimetry

被引：0
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作者：
Alessandro Capone
Giovanni Paolo Romano
Alfredo Soldati
机构：
[1] Università La Sapienza,Dipartimento Ingegneria Meccanica e Aerospaziale
[2] Università degli Studi di Udine,Dipartimento Ingegneria Elettrica, Gestionale e Meccanica
来源：
Experiments in Fluids | 2015年 / 56卷
关键词：
Particle Image Velocimetry; Turbulence Intensity; Streamwise Velocity; Stokes Number; Particle Tracking Velocimetry;
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摘要：
The near field of a turbulent circular pipe jet laden with rigid rod-like particles is investigated experimentally by means of particle image velocimetry. Two mass fraction loadings are examined at a Reynolds number equal to 9,000. A simple and robust phase discrimination scheme based on image intensity threshold is presented and validated. Simultaneous flow and dispersed phase velocities data are discussed and compared to literature data for spherical and elongated particles providing insight on phase interactions. Being the Stokes number around unity, both inertial and dynamical effects have high relevance, the former giving rise to velocity lag among particles and fluid and the latter to turbulence modulation in the carrier flow induced by the dispersed phase.
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