Results 261 to 270 of about 13,307 (305)

Behavior of Bubbles in Bubble Columns with Vibration Exciter

Chemie Ingenieur Technik, 2013
AbstractBlasensäulen, die von unten mit einem Bodenschwinger im Frequenzbereich zwischen 40 und 400 Hz angeregt werden, zeigen deutlich verbesserte Stoffübergangsgeschwindigkeiten. Dies ist durch eine Verkleinerung der Blasen durch Spaltung und die damit verbundene Oberflächenvergrößerung bedingt. Hinzu kommt eine intensive Bewegung an der Blasengrenze.
Boris Kniazev, Frerich J. Keil
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Bubble Column Reactors

ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Nigar Kantarci, Fahir Borak, Kutlu O. Ulgen   +2 more
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Forced Bubble Columns

, 2022
In many chemical, biochemical and pharmaceutical industrial processes, bubble breakage is very important for gas component to dissolve and react with surrounding liquid.
Ma, Jia
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Bubble size distribution in bubble columns

The Canadian Journal of Chemical Engineering, 1990
AbstractThe bubble size distributions are measured for the air‐water system as a function of air velocity at room temperature in two bubble columns. High speed cinephotography and fiber optic probe techniques are used to measure the bubble size. Our limited measurements suggest that the bubble size may be independent of gas velocity in the range 3.6 to
A. C. Saxena, N. S. Rao, S. C. Saxena
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Bubble Formation and Coalescence in Bubble Columns

Chemie Ingenieur Technik, 1989
Etude du mecanisme de formation et de coalescence des bulles au niveau d'orifices simples et triples immerges dans de l'eau dans une colonne bidimensionnelle.
Mohammad Jamialahmadi, Hans Müller‐Steinhagen   +1 more
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Understanding bubble hydrodynamics in bubble columns

Experimental Thermal and Fluid Science, 2013
Abstract Compared to conventional gas–liquid bubble columns, gas–liquid columns including both gas and liquid flows have been investigated less due to their complex hydrodynamics and operational difficulties. In this study, simultaneous non-intrusive methods of column shell vibration and pressure fluctuation measurements were coupled with direct ...
Amir Sheikhi, Rahmat Sotudeh-Gharebagh, Reza Zarghami, Navid Mostoufi, Mehrdad Alfi   +4 more
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Coalescence efficiency of bubbles in bubble columns

The Canadian Journal of Chemical Engineering, 2011
AbstractBubble size distribution was modelled by employing the population balance equation (PBE). All three bubble coalescence mechanisms (turbulence, buoyancy and laminar shear) and the main bubble breakup mechanism (breakup due to turbulent eddies) were considered in the model.
Navid Bizmark, Navid Mostoufi, Mohammad‐Reza Mehrnia, Simin M. Zarringhalam, Aryan Yazdani   +4 more
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Prediction of axial liquid velocity profile in bubble columns

Chemical Engineering Science, 2001
The Liquid Flow and Mixing Behavior in Bubble Columns is Partially Described by Means of Global Liquid Recirculation Velocity Profile. Due to the Complex Character of the Flow in Bubble Columns, the Prediction of the Axial Liquid Circulation is Still a ...
Muthanna H Al-Dahhan
exaly   +3 more sources

Hydrodynamics in bubble columns

Chemical Engineering and Processing: Process Intensification, 1989
Abstract A heterogeneous fluid dynamic model has been developed to describe the complex flow structure of two-phase flow in bubble columns. The equation of continuity and the momentum balances are the basis of the model. The coupling of the two phases is performed by a force of interaction which is deduced by a force balance around a single rising ...
H.-E Gasche, Ch Edinger, H Kömpel, H Hofmann   +3 more
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Circulation in bubble columns

AIChE Journal, 1997
AbstractLiquid circulation in bubble columns influences many system properties such as mass transfer and catalyst dispersion. Conditions favorable for liquid circulation often exist only for highly turbulent slurries. Experiments under conditions of lowered surface tension proved conclusively that uniform circulation can exist even in the bubbly‐flow ...
L. F. Burns, R. G. Rice
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