On the growth of homogeneously nucleated water droplets in nitrogen: an experimental study

Fransen, M. A. L. J.; Sachteleben, E.; Hrubý, Jan; Smeulders, David

doi:10.1007/s00348-014-1780-y

Cited by 15 publications

(13 citation statements)

References 40 publications

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“…Minute temperature-deviations that result from a slightly varying initial temperature were compensated using established postprocessing. 32,35 Our results are compared with experimental results by Holten et al, 10 Hyvärinen et al, 24 Manka et al, 7 Wölk and Strey, 12 and Miller et al 62 The data by Hyvärinen et al 24 and Manka et al 7 have been obtained with a laminar flow diffusion chamber that was used by both groups. Wölk and Strey, 12 using a nucleation pulse chamber, and Miller et al, 62 employing an expansion cloud chamber, used argon as carrier gas.…”

Section: Resultsmentioning

confidence: 71%

“…2, we estimate the nonisothermal effect for our conditions (p = 107 kPa, T = 240 K, S = 13, and other physical properties taken from Ref. 35). We find that according to the theory of Barrett, 30 the nucleation rate for our nonisothermal conditions is a factor 1.4 smaller than for isothermal conditions.…”

Section: Resultsmentioning

confidence: 78%

“…The PEWT has been used extensively to investigate water nucleation. 10,23,[33][34][35] Luijten et al 23 performed the first comprehensive study at high pressure (1.0 MPa-4.0 MPa), and Holten et al 10 studied water nucleation in helium at atmospheric pressure (100 kPa). While systematic discrepancies between the two studies were found, it is the work by Holten et al, 10 using an improved PEWT, that shows excellent agreement with data by Wölk and Strey.…”

Section: Purpose and Outlinementioning

confidence: 99%

“…This was reported in an earlier publication. 35 (3) Two experimental techniques were added to determine the molar water vapor fraction: Chilled mirror hygrometry 45 and Karl Fisher coulometry. 46 The corresponding devices were installed in such a way that they could measure the gas-vapor composition of both the inflow and outflow of the PEWT.…”

Section: Experiments and Theorymentioning

confidence: 99%

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On the effect of pressure and carrier gas on homogeneous water nucleation

Fransen

Hrubý

Smeulders

et al. 2015

The Journal of Chemical Physics

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Homogeneous nucleation rates of water droplets were measured at a nucleation temperature close to 240 K in a Pulse-Expansion Wave Tube (PEWT). Several measures were taken to improve the data obtained with the PEWT. For instance, the molar water vapor fraction was determined with three independent techniques. The resulting standard uncertainty of the supersaturation was within 1.8%. Results are given for water nucleation in helium at 100 kPa and at 1000 kPa and in nitrogen at 1000 kPa. Two trends were observed: (i) the values of the nucleation rate of water in helium at 1000 kPa are slightly but significantly higher (factor 3) than its values at 100 kPa and (ii) nucleation rates of water in nitrogen at 1000 kPa are clearly higher (factor 10) than in helium at the same pressure. It is argued that the explanation of the two observed trends is different. For case (i), it is the insufficient thermalization of the growing water clusters in helium at the lowest pressure that has a reducing effect on the nucleation rate, although a full quantitative agreement has not yet been reached. For case (ii), thermal effects being negligible, it is the pressure dependency of the surface tension, much stronger for nitrogen than for helium, that explains the trends observed, although also here a full quantitative agreement has not yet been achieved.

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Section: Resultsmentioning

confidence: 71%

Section: Resultsmentioning

confidence: 78%

Section: Purpose and Outlinementioning

confidence: 99%

Section: Experiments and Theorymentioning

confidence: 99%

See 2 more Smart Citations

On the effect of pressure and carrier gas on homogeneous water nucleation

Fransen

Hrubý

Smeulders

et al. 2015

The Journal of Chemical Physics

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“…Water under the metastable supercooled state is currently investigated, especially, for better understanding and more accurate modelling of formation and growth of liquid droplets and ice crystals in upper atmosphere [3].…”

Section: Introductionmentioning

confidence: 99%

An apparatus with a horizontal capillary tube intended for measurement of the surface tension of supercooled liquids

Vinš

Hošek

Hykl

et al. 2015

EPJ Web of Conferences

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Abstract. New experimental apparatus for measurement of the surface tension of liquids under the metastable supercooled state has been designed and assembled in the study. The measuring technique is similar to the method employed by P.T. Hacker [NACA TN 2510] in 1951. A short liquid thread of the liquid sample was sucked inside a horizontal capillary tube partly placed in a temperature-controlled glass chamber. One end of the capillary tube was connected to a setup with inert gas which allowed for precise tuning of the gas overpressure in order of hundreds of Pa. The open end of the capillary tube was precisely grinded and polished before the measurement in order to assure planarity and perpendicularity of the outer surface. The liquid meniscus at the open end was illuminated by a laser beam and observed by a digital camera. Application of an increasing overpressure of the inert gas at the inner meniscus of the liquid thread caused variation of the outer meniscus such that it gradually changed from concave to flat and subsequently convex shape. The surface tension at the temperature of the inner meniscus could be evaluated from the overpressure corresponding to exactly planar outer meniscus. Detailed description of the new setup together with results of the preliminary tests is provided in the study.

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