TITLE

Analytical prediction of homogeneous nucleation in rapidly expanding pure vapours

AUTHOR(S)
Young, J. B.; Huang, L.
PUB. DATE
August 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 534 Issue 1, p884
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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 latent heat as the droplets grow rapidly to macroscopic sizes. Numerical calculation methods are normally used to predict the conditions at maximum subcooling but these are computationally time consuming and difficult to implement in a multidimensional flow calculation. By introducing certain assumptions capitalising on the short timescale of the nucleation process, the paper shows that it is possible to obtain an elegant analytical solution for any prescribed pressure distribution. The analysis provides physical insight into flow condensation processes and incorporation into CFD procedures should remove the need for very fine meshes and excessive computing resources.
ACCESSION #
5669621

 

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