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Original title:
Consistency of empirical corrections of the classical nucleation theory for nucleation in steam with nucleation experiments and molecular simulations
Authors: Hrubý, Jan ; Duška, Michal ; Němec, Tomáš ; Kolovratník, M.
Document type: Papers
Conference/Event: Wet Stream Conference Prague, Praha (CZ), 20160912
Year: 2016
Language: eng
Abstract: 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\nnucleation 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.
Keywords: nucleation; water; wet steam
Project no.: 7F14466 (CEP), GA16-02647S (CEP), LM2015042 (CEP)
Funding provider: GA MŠk, GA ČR, GA MŠk
Host item entry: Wet Stream Conference Prague 2016 - Proceedings, ISBN 978-80-01-5997-5
Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0272410
Permalink: http://www.nusl.cz/ntk/nusl-354700
The record appears in these collections:
Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers
Authors: Hrubý, Jan ; Duška, Michal ; Němec, Tomáš ; Kolovratník, M.
Document type: Papers
Conference/Event: Wet Stream Conference Prague, Praha (CZ), 20160912
Year: 2016
Language: eng
Abstract: 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\nnucleation 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.
Keywords: nucleation; water; wet steam
Project no.: 7F14466 (CEP), GA16-02647S (CEP), LM2015042 (CEP)
Funding provider: GA MŠk, GA ČR, GA MŠk
Host item entry: Wet Stream Conference Prague 2016 - Proceedings, ISBN 978-80-01-5997-5
Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0272410
Permalink: http://www.nusl.cz/ntk/nusl-354700
The record appears in these collections:
Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers
Record created 2017-07-03, last modified 2021-11-24