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Tube transport of water vapor with condensation and desorption
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Image of FIG. 1.
FIG. 1.

A schematic layout of the measurement. The blue tubes are made of PTFE. Note that the sizes of different parts of the layout are not in their real relative scales.

Image of FIG. 2.
FIG. 2.

Condensation of drops of water at tube wall. Images of a clean (a) and an aged tube (b) 2 min after a step change in took place (enhanced online). [URL: http://dx.doi.org/10.1063/1.4804639.1]doi: 10.1063/1.4804639.1.

Image of FIG. 3.
FIG. 3.

Breakthrough curve of a pulse of water vapor advected along an aged PTFE tube: Its normalized concentration as a function of dimensionless time (τ). Shown are the measured data (black dots), their fit by the sorption model (thick gray line), and by Taylor dispersion alone for (red dashed line) and (blue small dots). The fit by the sorption model was made with and ; the peak was 32% in the experiment.

Image of FIG. 4.
FIG. 4.

Product of the fitting variables of the sorption model, , as a function of relative humidity ( [%]) for a clean (light blue spheres) and an aged (black diamonds) tube.

Image of FIG. 5.
FIG. 5.

Transfer functions () as a function of frequency (, [Hz]): Data from field measurements of turbulent fluctuations in water-vapor concentration in 2007 (black dots) and 2011 (black crosses), fits based on the proposed (Eq. (4) ), and fits based on a Lorentzian .  = 58% and for both years. Fitting was made with and for 2007, and and for 2011.



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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Tube transport of water vapor with condensation and desorption