Investigating SO2 transfer across the air-water interface via LIF
A laser-induced fluorescence technique to measure vertical concentration profiles of the tracer sulfur dioxide above the air-water interface is presented. The imaging technique is capable of recording profiles at a rate of up to 40 Hz with a sufficiently high spatial resolution to resolve the profil...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
16 March 2019
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| In: |
Experiments in fluids
Year: 2019, Volume: 60, Issue: 4 |
| ISSN: | 1432-1114 |
| DOI: | 10.1007/s00348-019-2713-6 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1007/s00348-019-2713-6
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| Author Notes: | Sonja I. Friman, Bernd Jähne |
| Summary: | A laser-induced fluorescence technique to measure vertical concentration profiles of the tracer sulfur dioxide above the air-water interface is presented. The imaging technique is capable of recording profiles at a rate of up to 40 Hz with a sufficiently high spatial resolution to resolve the profile within the viscous boundary layer in the air at the air-water interface. The new technique was tested in a small wind-wave facility under invasion conditions with an initial concentration of 100 ppm in the air at estimated wind speeds u10u10u_{10} of 0.7-3 m/s, corresponding to friction velocities between 2.4 and 9.3 cm/s. The laser used for fluorescence excitation has a wavelength of 223.7 nm. In this work, a proof of principle is presented as well as a first evaluation of the capabilities and uncertainties of the technique. The new technique enables a detailed study of the transport processes in the air-sided boundary layer at a wavy interface including the gas transfer velocity, turbulent concentration fluctuations, and the partitioning of gas transfer between air and water.Graphical abstract Open image in new window |
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| Item Description: | Gesehen am 10.04.2019 Im Titel ist „2“ tiefgestellt |
| Physical Description: | Online Resource |
| ISSN: | 1432-1114 |
| DOI: | 10.1007/s00348-019-2713-6 |