TITLE

How well are supersaturation and temperature in expansion chambers predicted by the Poisson-equation?

AUTHOR(S)
Zach, S.; Vrtala, A.; Reischl, G. P.; Wagner, P. E.
PUB. DATE
August 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 534 Issue 1, p335
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Various experimental studies of nucleation processes have been reported, which were performed using expansion chambers. In these studies the gas temperatures and vapor supersaturations at the end of the adiabatic expansions considered have usually been determined by means of the Poisson equation. Recently, deviations from the Poisson equation were reported and an empirical correction has been suggested. In the present study gas temperatures and vapor supersaturations at the end of adiabatic expansions were experimentally determined from quantitative measurements of condensational drop growth rates. Except for one expansion at an extremly high expansion ratio no significant deviations from the Poisson equation were found. The trend predicted by the empirical relation has not been observed experimentally.
ACCESSION #
5669759

 

Related Articles

  • Aerosol nucleation and growth in a mixture of sulfuric acid/alpha-pinene oxidation products at the CERN CLOUD chamber. Tröstl, Jasmin; Bianchi, Federico; Kürten, Andreas; Rondo, Linda; Simon, Mario; Sarnela, Nina; Jokinen, Tuija; Heinritzi, Martin; Dommen, Josef; Kirkby, Jasper; Weingartner, Ernest; Baltensperger, Urs; CLOUD Collaboration // AIP Conference Proceedings;May2013, Vol. 1527 Issue 1, p322 

    The role of α-pinene in aerosol nucleation and growth was investigated using the CERN CLOUD chamber, a nano scanning mobility particle sizer (nanoSMPS) and several condensation particle counters (CPCs) with different diameter cut-offs. Different oxidation conditions for α-pinene - OH·...

  • Nucleation of sulfur hexafluoride. Ye, Peng; Bertelsmann, Anne; Heist, Richard H. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p19 

    We measured the homogeneous nucleation of sulfur hexafluoride using a diffusion cloud chamber under conditions that avoid the possibility of non-diffusive modes of transport within the cloud chamber thus ensuring reliable data from our measurements. We extended the critical supersaturation...

  • Analytical prediction of homogeneous nucleation in rapidly expanding pure vapours. Young, J. B.; Huang, L. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p884 

    The paper describes an analytical method for predicting the maximum vapour subcooling and final droplet number distribution in a rapidly expanding pure vapour undergoing homogeneous nucleation. This type of flow is characterised by very high nucleation rates which are quenched by the release of...

  • Characterization of aerosol particles by their heterogeneous nucleation: Activity at low supersaturations with respect to water and various organic vapors. Holla¨nder, W.; Dunkhorst, W.; Windt, H. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p732 

    An expansion type cloud condensation nucleus counter/Kelvin spectrometer has been operated with water and various organic liquids. Heterogeneous nucleation is markedly different depending on the particle/vapor material combination.

  • Comments on kinetics and thermodynamics of condensations under homogeneous conditions. Bauer, S. H.; Zhang, Y-.X; Wilcox, C. F. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p159 

    © 2000 American Institute of Physics.

  • Homogeneous nucleation and shock wave interaction in condensing steam flows. White, A. J.; Young, J. B. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p888 

    It is well known that the release of latent heat by a homogeneously nucleating steam flow can have a strong effect on the flow dynamics and this is particularly true if the flow is transonic or supersonic with shock waves present. Most research has been aimed at calculating the overall flow...

  • D[sub 2]O-H[sub 2]O condensation in supersonic nozzles. II. Modeling. Heath, Christopher H.; Streletzky, Kiril A.; Wyslouzil, Barbara E.; Wilemski, Gerald // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p63 

    An integral steady state model of nucleation and condensation was used to examine the formation and growth of D[sub 2]O droplets in a supersonic nozzle. The classical nucleation rate expression was used together with isothermal and nonisothermal droplet growth laws. For each experiment, the...

  • Nucleation in condensed systems. Kelton, K. F. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p386 

    Studies in condensed phases allow the exploration of some aspects of nucleation that are weakly manifest in gas phase condensation. Time-dependent rates that depend strongly on thermal history, competition between long-range diffusion and interfacial processes, and the influence of the...

  • Molecular dynamics studies of evaporation and condensation coefficients in nucleation theory. Schaaf, P.; Senger, B.; Voegel, J.-C.; Bowles, R. K.; Reiss, H. // AIP Conference Proceedings;2000, Vol. 534 Issue 1, p23 

    A rate theory that accounts for multimolecular addition or loss of molecules from a cluster is developed for the homogeneous nucleation of a liquid from its metastable vapor. Molecular dynamics simulations of Lennard-Jones argon are used to study the evaporation coefficients of Stillinger type...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics