NDLI: Flow Property Measurements of Stirred-Tank Flow Across Three Reynolds Number Decades

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Yang, Yihong Yoon, Roe-Hoan Demetri, P. Telionis Weber, Asa Foreman, Don
Copyright Year	2008
Abstract	The flow in stirred tanks is very complicated because it passes around the rotating impeller blades, interacts with the stationary baffles or stator blades leading to high-intensity turbulence, and then goes through loops and returns to the impeller region. A penetrating understanding of the flow in stirred tanks is necessary for the tank design and optimization, because it could have a significant impact to the overall design characteristics, which will affect directly the production, the quality of the product and the maintenance costs. Despite the recent advances in computational fluid dynamics (CFD), testing still plays a vital role in the development of high-performance stirred tanks. This paper describes measurements and results obtained by traversing a five-hole probe in a 6-m3 stirred tank. The three-dimensional flow field was obtained. The separation region was also detected. The majority of the measurements were conducted in the 6-m3 tank, but unique to this investigation are measurements we have conducted with Pitot tubes in an 160-m3 geometrically-similar full-scale tank. We also have earlier results obtained by Particle Image Velocimetry (PIV) in another geometrically-similar but much smaller tank, namely a 0.1m3 tank. This provides the unique opportunity to explore how such flows scale with size and speed, extending to Reynolds numbers that approach ten million. Some numerical results were also conducted, using the commercial code FLUENT, and the results are presented together with the experimental data.
Sponsorship	Fluids Engineering Division
Starting Page	329
Ending Page	336
Page Count	8
File Format	PDF
ISBN	9780791848418
DOI	10.1115/FEDSM2008-55154
e-ISBN	0791838323
Volume Number	Volume 2: Fora
Conference Proceedings	ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences
Language	English
Publisher Date	2008-08-10
Publisher Place	Jacksonville, Florida, USA
Access Restriction	Subscribed
Subject Keyword	Turbulence Blades Computational fluid dynamics Reynolds number Maintenance Separation (technology) Flow (dynamics) Optimization Design Impellers Particulate matter Stators Flowmeters Probes Testing
Content Type	Text
Resource Type	Article

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