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Název:
Consistency of empirical corrections of the classical nucleation theory for nucleation in steam with nucleation experiments and molecular simulations
Autoři: Hrubý, Jan ; Duška, Michal ; Němec, Tomáš ; Kolovratník, M.
Typ dokumentu: Příspěvky z konference
Konference/Akce: Wet Stream Conference Prague, Praha (CZ), 20160912
Rok: 2016
Jazyk: eng
Abstrakt: 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.
Klíčová slova: nucleation; water; wet steam
Číslo projektu: 7F14466 (CEP), GA16-02647S (CEP), LM2015042 (CEP)
Poskytovatel projektu: GA MŠk, GA ČR, GA MŠk
Zdrojový dokument: Wet Stream Conference Prague 2016 - Proceedings, ISBN 978-80-01-5997-5
Instituce: Ústav termomechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0272410
Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-354700
Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav termomechaniky
Konferenční materiály > Příspěvky z konference
Autoři: Hrubý, Jan ; Duška, Michal ; Němec, Tomáš ; Kolovratník, M.
Typ dokumentu: Příspěvky z konference
Konference/Akce: Wet Stream Conference Prague, Praha (CZ), 20160912
Rok: 2016
Jazyk: eng
Abstrakt: 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.
Klíčová slova: nucleation; water; wet steam
Číslo projektu: 7F14466 (CEP), GA16-02647S (CEP), LM2015042 (CEP)
Poskytovatel projektu: GA MŠk, GA ČR, GA MŠk
Zdrojový dokument: Wet Stream Conference Prague 2016 - Proceedings, ISBN 978-80-01-5997-5
Instituce: Ústav termomechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0272410
Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-354700
Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav termomechaniky
Konferenční materiály > Příspěvky z konference
Záznam vytvořen dne 2017-07-03, naposledy upraven 2021-11-24.