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DOI: 10.5445/KSP/1000003544
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Gas transfer at the air-water interface in a turbulent flow environment

Herlina

Abstract:
The gas transfer process across the air-water interface in a ottom-shear-induced turbulent environment was investigated to gain improved fundamental understanding of the physical mechanisms that control the process. For this purpose, it is necessary to reveal the hydrodynamics of the flow field as well as the molecular diffusion and the turbulent transport contributions to the total flux. Therefore, detailed laboratory experiments were conducted to obtain these information.
The experiments were performed in a grid-stirred tank using a combined Particle Image Velocimetry - Laser Induced Fluorescence (PIV-LIF) technique that has been developed for these near surface gas transfer measurements. The turbulence characteristics of the velocity near the interface were acquired from the PIV measurements and showed generally good agreement with the theoretical profiles from Hunt & Graham (1978). The LIF technique enabled visualization of the planar concentration fields which provided more insight into the gas transfer mechanisms. The high data resolution allowed detailed quantification of the concentration distribution within the thin aq ... mehr


Zugehörige Institution(en) am KIT Institut für Hydromechanik (IFH)
Publikationstyp Hochschulschrift
Jahr 2005
Sprache Englisch
Identifikator ISBN: 3-937300-74-0
ISSN: 1439-4111
URN: urn:nbn:de:0072-35444
KITopen ID: 1000003544
Verlag Universitätsverlag Karlsruhe, Karlsruhe
Umfang IX, 128 S.
Serie Dissertationsreihe am Institut für Hydromechanik der Universität Karlsruhe (TH) ; 2005,4
Abschlussart Dissertation
Fakultät Fakultät für Bauingenieur-, Geo- und Umweltwissenschaften (BGU)
Institut Institut für Hydromechanik (IFH)
Prüfungsdaten 06.07.2005
Referent/Betreuer Prof. G. H. Jirka
Schlagworte gas transfer, grid-stirred turbulence, combined particle image velocimetry and laser induced fluorescence
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