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Transport Processes at Taylor Bubbles in Vertical Channels

Hard Copy
EUR 69.90

E-book
EUR 49.90

Transport Processes at Taylor Bubbles in Vertical Channels (Volume 8) (English shop)

Sven Kastens (Author)

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ISBN-13 (Hard Copy) 9783736974043
ISBN-13 (eBook) 9783736964044
Language English
Page Number 190
Lamination of Cover matt
Edition 1
Book Series Berichte aus dem Institut für Mehrphasenströmungen
Volume 8
Publication Place Göttingen
Place of Dissertation Hamburg
Publication Date 2021-04-19
General Categorization Dissertation
Departments Mechanical and process engineering
Allgemeine Verfahrenstechnik
Keywords Taylor bubbles, Taylorblasen, Mass transfer, Stofftransport, channel, Kanal, pipe, Rohr, elongated, langezogen, Transport processes, Transportprozesse, Fluid dynamics, Fluiddynamik, Particle Image Velocimetry, Laser induced fluroescence, Laserinduzierte Fluoreszenz, backlight imaging, Gegenlichtaufnahme, rise velocity, Aufstiegsgeschwindigkeit, mass transfer coefficient, Stofftransportkoeefizient, Flow regime, Strömungsform, CO2, carbon dioxide, Kohlenstoffdioxid, water, Wasser, tenside, Tenside, surfactants, Oberflächenaktive Substanzen, Triton X-100, channel geometry, Kanalgeometry, volume difference, Volumendifference, Fluorescein, Acid Yellow 73, Uranin, adsorption, emission, Laser measuring technique, Lasermesstechnik, wall effects, Wandeffekte, concentration boundary layer, Konzentrationsgrenzschicht, boundary layer, Grenzschicht, visualisation, Visualisierung, optical methodes, optische Methoden, film flow, Filmströmung, wake, Nachlaufgebiet, mixing, Vermischung, Sherwood Correlation, Sherwood-Korrelation, contamination, Kontamination, volume independent, volumenunabhängig, Fluorescence, Fluoreszenz, bubbly flow, Blasenströmung
URL to External Homepage https://www.tuhh.de/ims/publications/dissertations.html
Description

Gas / liquid contact apparatuses are widely used in chemical, biochemical or pharmaceutical industry to provide and transfer gas species as reactant from the gaseous phase to pre-dissolved reactants in the liquid phase enabling a preferred reaction. The global and local transport are complex interlinked processes and therefore in practice in reactor design industry, mostly empirically correlated. For a secure control of the overall process and a more efficient reactor design, the local transport processes at gas / liquid interfaces need to be investigated in complexity reduced systems to be understood. Elongated bubbles, Taylor bubbles, in vertical channels 5.5 < D < 8 mm overcome the problem of dynamic shape deformation, complex 3D rise trajectories and they have a volume independent rise velocity, which make them the ideal experiment for reliable and reproducible investigations. Detailed optical measurements of global and local processes via high-speed Shadowgraphy, 2D2C PIV and p-2D LIF give new insights into the dependency of local bubble shape and global terminal rise velocity, establish a Sherwood correlation of shrinking CO2 bubbles in various channel sizes and shows the coupling of local transport phenomena at the bubble interface and the mixing in the wake region.