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Consistency of empirical corrections of the classical nucleation theory for nucleation in steam with nucleation experiments and molecular simulations
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SYSNO ASEP 0475731 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Consistency of empirical corrections of the classical nucleation theory for nucleation in steam with nucleation experiments and molecular simulations Author(s) Hrubý, Jan (UT-L) RID, ORCID
Duška, Michal (UT-L) RID, ORCID
Němec, Tomáš (UT-L) RID
Kolovratník, M. (CZ)Number of authors 4 Source Title Wet Stream Conference Prague 2016 - Proceedings. - Praha : Česke vysoké učení technické, 2016 / Kolovratník M. ; Bartoš O. - ISBN 978-80-01-5997-5 Pages s. 182-200 Number of pages 19 s. Publication form Print - P Action Wet Stream Conference Prague Event date 12.09.2016 - 14.09.2016 VEvent location Praha Country CZ - Czech Republic Event type WRD Language eng - English Country CZ - Czech Republic Keywords wet steam ; water ; nucleation Subject RIV BJ - Thermodynamics OECD category Thermodynamics R&D Projects 7F14466 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA16-02647S GA ČR - Czech Science Foundation (CSF) Institutional support UT-L - RVO:61388998 Annotation We compare experimental nucleation rates for water vapour in various carrier gases, nucleation rates deduced from empirical adjustments of the classical nucleation theory (CNT) earlier developed to reproduce pressure and optical data for condensing steam flows in converging-diverging nozzles and turbine stages, and ucleation rates obtained from molecular simulations. Results of original molecular dynamic simulations for TIP4P/2005 force field in the NVE conditions are provided. New experimental nucleation rate data sets are generated based on empirical CNT corrections by Valha and Nedbal (1980) and by Petr and Kolovratník (2011). Correction of the CNT for non-isothermal nucleation conditions is applied to experimental, simulated and the derived experimental data. The derived experimental
nucleation rate data follow a similar temperature trend as the nucleation rate data for water vapour in carrier gases at lower temperatures. The ratio of observed nucleation rates to CNT predictions decreases more steeply with temperature than the empirical correction by Wölk et al. (2002). Ratios of nucleation rates computed from molecular simulations to CNT predictions do not show a significant temperature trend.Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2018
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