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Turbulent Gas Flux Measurements near the Air-Water Interface in a Grid-Stirred Tank

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Transport at the Air-Sea Interface

Part of the book series: Environmental Science and Engineering ((ENVSCIENCE))

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Abstract

The gas transfer process across the air-water interface induced by far-field homogeneous turbulence generated in the water phase was investigated experimentally. The measurements were performed in a grid-stirred tank using a combined Particle Image Velocimetry (PIV) - Laser Induced Fluorescence (LIF) (PIV-LIF) technique, which enables simultaneous and spatially synoptic measurements of velocity and gas concentration fields. The techniques allowed visualization of the velocity and concentration fields with good spatial and temporal resolution and thus provided good insight into the gas transfer mechanisms. Detailed quantification of the gas concentration distribution within the thin aqueous boundary layer as well as the near surface hydrodynamics were obtained. With the combined PIV-LIF technique, the turbulent mass flux covariance term c′w′ was quantified directly. Comparing the turbulent mass flux with the total mean mass flux determined from the reaeration (bulk) measurements, it could be shown that the contribution of c′w′ is indeed significant.

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Authors and Affiliations

  1. Institute for Hydromechanics, University of Karlsruhe, Kaiserstraße 12, 76131, Karlsruhe, Germany

    Herlina Jirka & Gerhard H. Jirka

Authors
  1. Herlina Jirka
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  2. Gerhard H. Jirka
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Editor information

Editors and Affiliations

  1. Interdisciplinary Center for Scientific Computing, University of Heidelberg, Im Neuenheimer Feld 368, 69120, Heidelberg, Germany

    Christoph S. Garbe  & Bernd Jähne  & 

  2. Institute of Environmental Physics, University of Heidelberg, Im Neuenheimer Feld 229, 69120, Heidelberg, Germany

    Christoph S. Garbe  & Bernd Jähne  & 

  3. Naval Research Laboratory, 4555 Overlook Avenue SW, Washington DC, 20375, USA

    Robert A. Handler

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© 2007 Springer-Verlag Berlin, Heidelberg

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Jirka, H., Jirka, G.H. (2007). Turbulent Gas Flux Measurements near the Air-Water Interface in a Grid-Stirred Tank. In: Garbe, C.S., Handler, R.A., Jähne, B. (eds) Transport at the Air-Sea Interface. Environmental Science and Engineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-36906-6_2

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