Contact time during impact of a spherical particle against a plane gas-liquid interface: experiment

Nguyen, A. V., Schulze, H. J., Stechemesser, H. and Zobel, G. (1997) Contact time during impact of a spherical particle against a plane gas-liquid interface: experiment. International Journal of Mineral Processing, 50 1-2: 113-125. doi:10.1016/S0301-7516(97)00002-1


Author Nguyen, A. V.
Schulze, H. J.
Stechemesser, H.
Zobel, G.
Title Contact time during impact of a spherical particle against a plane gas-liquid interface: experiment
Journal name International Journal of Mineral Processing   Check publisher's open access policy
ISSN 0301-7516
Publication date 1997
Sub-type Article (original research)
DOI 10.1016/S0301-7516(97)00002-1
Volume 50
Issue 1-2
Start page 113
End page 125
Total pages 13
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Abstract The impact interaction of a solid sphere against an initially plane gas-liquid interface is experimentally studied with a new experimental principle. The interface is formed at the bottom of a capillary of about 8 mm inner diameter. The sphere impacts the interface inside the capillary. The new principle is based on video imaging of the grey levels of the gas-liquid interface using light beam reflection. The grey levels are recorded by a CCD high-speed video system. Collision time is determined as the time between the first two maxima of the grey levels and obtained by means of Fourier analysis. The dependence of collision time on the diameter and density of impacting particles is investigated and compared with the available theoretical models. The experimentally determined collision time is longer than the collision time predicted by the available theories. The reasons for this disagreement are discussed. The disagreement may be affected by the dependence of the restoring force on the radius of the plane gas-liquid interface.
Keyword Bubble-particle interaction
Collision time
Contact time
Gas-liquid interface deformation
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
 
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Created: Sat, 30 Mar 2013, 22:54:34 EST by Professor Anh Nguyen on behalf of School of Chemical Engineering