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CFD modelling of laminar film and spontaneous condensation in presence of noncondensable gas
KTH, School of Engineering Sciences (SCI), Physics, Reactor Technology.
KTH, School of Engineering Sciences (SCI), Physics, Reactor Technology.ORCID iD: 0000-0001-5595-1952
2006 (English)In: Archives of Thermodynamics, Vol. 27, no 2, 23-36 p.Article in journal (Refereed) Published
Abstract [en]

A new mechanistic model for prediction of wall condensation in presence of noncondensable gas is presented. The model is based on the resolution of flow and temperature fields in the boundary layer to allow for prediction of diffusion and accumulation of noncondensable gas in the vicinity of a liquid film. Additionally, when the temperature in the vapour-gas mixture drops locally below the critical value defined by the Wilson's line, the fog formation is modelled. Both accumulation of noncondensable gas and fog formation can significantly influence the heat transfer process and thus they must be carefully modelled in many industrial applications. In particular, the degradation of heat transfer rates has an essential influence on the performance of safety systems in nuclear power plants. The present model has been implemented into a commercial computational fluid dynamics code CFX-4.

Place, publisher, year, edition, pages
2006. Vol. 27, no 2, 23-36 p.
Keyword [en]
Condensation, Heat transfer, Multiphase flow, Noncondensable gas, Nuclear safety, CFD, Boundary layer flow, Computational fluid dynamics, Diffusion, Laminar flow, Thermal effects, Fog formation, Gas accumulation, Liquid film, Nuclear safety, Flow of fluids
National Category
Energy Engineering Other Physics Topics
URN: urn:nbn:se:kth:diva-155837ScopusID: 2-s2.0-33751529964OAI: diva2:769831

QC 20141209

Available from: 2014-12-09 Created: 2014-11-13 Last updated: 2014-12-09Bibliographically approved

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Karkoszka, KrzysztofAnglart, Henryk
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