Surface Aeration Threshold in Agitated Vessels

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Title:Surface Aeration Threshold in Agitated Vessels
Creators:
Wichterle, Kamil
Svěrák, Tomáš
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 61, 5, pp. 681-690
Uncontrolled Keywords:Bubbles, Agitation, Gas-liquid

Abstract

Violent agitation of liquids in mixing vessels may result in the regime of surface aeration being attained when the bubbles formed at the liquid surface enter the impeller region. Analysis of data on surface aeration for different liquids in a set of geometrically similar agitated vessels is presented. Data on the just aerated state as observed visually in transparent liquids, and data for the efficient aeration as determined from the break on the power number curve are considered. A simple model is developed for correlation of the data which enables the threshold of aeration to be predicted from the value of the recirculation number <i>Nc </i>= <i>Nd</i> (ρ/σ</i>)<sup>1/4</sup>. The possibility of interpreting various literature data for the aeration threshold and for the power input with use of <i>Nc</i> is demonstrated. Similar modelling rules hold also for the correlation of beginning of the efficient liquid-liquid dispersion.

Title:Surface Aeration Threshold in Agitated Vessels
Creators:
Wichterle, Kamil
Svěrák, Tomáš
Uncontrolled Keywords:Bubbles, Agitation, Gas-liquid
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:61
Number:5
Page Range:pp. 681-690
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19960681UNSPECIFIED
ID Code:968
Item Type:Article
Deposited On:06 Feb 2009 17:05
Last Modified:06 Feb 2009 16:05

Citation

Wichterle, Kamil; Svěrák, Tomáš (1996) Surface Aeration Threshold in Agitated Vessels. Collection of Czechoslovak Chemical Communications, 61 (5). pp. 681-690. ISSN 0010-0765

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