Homogeneous nucleation rates for water vapor in synthetic air are measured by means of a Pulse-Expansion Wave Tube (PEWT). A comparison of the experimental nucleation rates with the Classical Nucleation Theory (CNT) shows that a more elaborated model is necessary to describe supercooled water nucleation at elevated pressures (10 bar). CNT is about 3 orders of magnitude off in case of our measurements. The overall trends, however, are predicted reasonably well by CNT. The size of the critical cluster (n*CNT) is predicted to be about 29 water molecules. The size of the critical cluster is obtained experimentally as well using the Nucleation Theorem. The result for water nucleation at a nucleation pressure of 10 bar and nucleation temperature of approximately 238 K is: n* = 21±1 water molecules.
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24 May 2013
NUCLEATION AND ATMOSPHERIC AEROSOLS: 19th International Conference
23–28 June 2013
Fort Collins, Colorado, USA
Research Article|
May 24 2013
Homogeneous nucleation of water in synthetic air
M. A. L. J. Fransen;
M. A. L. J. Fransen
Department of Mechanical Engineering, Eindhoven University of Technology, P.O. box 513, 5600 MB Eindhoven,
Netherlands
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E. Sachteleben;
E. Sachteleben
Department of Mechanical Engineering, Eindhoven University of Technology, P.O. box 513, 5600 MB Eindhoven,
Netherlands
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J. Hrubý;
J. Hrubý
Institute of Thermomechanics AS CR, v.i.i., Dolejškova 5, CZ-182 00 Prague 8,
Czech Republic
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D. M. J. Smeulders
D. M. J. Smeulders
Department of Mechanical Engineering, Eindhoven University of Technology, P.O. box 513, 5600 MB Eindhoven,
Netherlands
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AIP Conf. Proc. 1527, 124–127 (2013)
Citation
M. A. L. J. Fransen, E. Sachteleben, J. Hrubý, D. M. J. Smeulders; Homogeneous nucleation of water in synthetic air. AIP Conf. Proc. 24 May 2013; 1527 (1): 124–127. https://doi.org/10.1063/1.4803219
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