Results 261 to 270 of about 59,892 (311)

Bubble-size distributions in foams

Advances in Colloid and Interface Science, 1992
Abstract Bubble-size distributions in foams can be used to study foam properties and to distinguish between the physical processes that contribute to the breakdown of the foam. These processes are drainage, coalescence and disproportionation. A new Foam Analyzer was developed to measure various foam characteristics like the rate of drainage, the rate
Bisperink, C.G.J., Ronteltap, A.D., Prins, A.   +2 more
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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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Acoustics of bubbly sediments with a distribution of bubble sizes.

The Journal of the Acoustical Society of America, 1991
A model for a saturated, porous elastic medium containing bubbles of gas [J. Acoust. Soc. Am. 73, 409–417 (1983)] has been combined with a model for a bubbly liquid with a bubble population whose radii vary continuously over a known distribution [J. Acoust. Soc. Am. Suppl. 1 88, (1990)] to obtain an acoustical model for saturated sediments containing a
J. A. Hawkins, A. Bedford
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Measurement of bubble size distribution: an acoustic technique

Chemical Engineering Science, 1992
This paper reports the successful correlation of the bubble size distribution in a bubbly two-phase flow with the sound spectrum as measured by a hydrophone and spectrum analyser. Two types of bubbly flow were considered: (i) horizontal two-phase flow in a pipeline and (ii) a two-phase turbulent axisymmetric jet.
Pandit, A. B, Varley, J, Thorpe, R. B, Davidson, J. F   +3 more
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Bubble size distribution near a pressure antinode

The Journal of the Acoustical Society of America, 1999
When strong ultrasonic standing wave fields are generated in liquid-filled resonators, cavitation bubbles emerge and build dynamic structures, typically near the pressure antinodes. For technical applications like sonochemical reactions taking place in the resonator, the size distribution of the clustering bubbles is an important parameter.
Mettin, R., Luther, Stefan, Ohl, Claus-Dieter, Lauterborn, W.   +3 more
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Bubble‐Size distributions and flow fields in bubble columns

AIChE Journal, 2002
AbstractBubble‐size distributions and flow fields in bubble columns are calculated numerically. The population balance is simplified and reduced to a balance equation for the average bubble volume. Models developed predict the rate of bubble breakup and coalescence based on physical principles.
F. Lehr, M. Millies, D. Mewes
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Bubble size distribution in the sparger region of bubble columns

Chemical Engineering Science, 2002
Abstract It is well known that the gas distributor can play an important role on the evolution of the bubble size distribution (BSD) in gas–liquid reactors, strippers and absorbers. Therefore, the main subject of the present work was to study the influence of sparger design and process parameters on the BSD in the sparger region of the considered ...
POLLI M., DI STANISLAO, MARCO SANTE, BAGATIN R., ABU BAKR E., MASI, MAURIZIO   +4 more
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Bubble Size Distribution in Oil‐Based Bubble Columns

Chemical Engineering & Technology, 2008
AbstractA practical population balance model was used to evaluate the bubble size distribution in a bubble column. In addition, the bubble size distribution in the bubble column was measured at different gas velocities by photography and analysis of the pictures.
S.‐S. Homayouni, M.‐R. Mehrnia, N. Mostoufi, M. Rajabi, A. Yazdani   +4 more
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Lognormal bubble size distributions

The Journal of the Acoustical Society of America, 2017
In the study of oceanic bubbles based on empirical acoustics, the distributions among the sizes are typically represented by power laws with negative slopes as convenient descriptors of data in log/log format. However, power laws do not address the fact that as bubble sizes approach zero their numbers must approach zero.
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Size Distribution of Cavitation Bubbles

2015
Acoustic cavitation is defined as the formation of a vapor cavity and bubbles in response to an acoustic field. One can generalize this definition to encompass any observable activity involving a bubble or a population of bubbles stimulated into motion by an acoustic field (Apfel in Methods in Experimental Physics 19:355–411, 1984). There are two basic
Shanshan Xu, Xiaodong Liu, Mingxi Wan
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