Original title: A two-structure model of themrodynamic properties and surface tension of supercooled water
Translated title: Dvou-strukturní model termodynamických vlastností a povrchového napětí podchlazené vody
Authors: Hrubý, Jan ; Holten, V.
Document type: Papers
Conference/Event: International Conference on the Properties of Water and Steam /14./, Kyoto (JP), 2004-08-29 / 2004-09-03
Year: 2005
Language: eng
Abstract: [eng] [cze]
A thermodynamic model was developed describing the liquid and gaseous phases of water. The model correctly represents the strong anomalous behavior of supercooled water. The anomalies are due to the vicinity of liquid-liquid critical point. The model approximates liquid water as a mixture of two competing structures (high- and low-density structure) and cavities. The thermodynamic state is found by minimizing the Gibbs free energy with respect to the proportion of the two structures and number of cavities. The mixture approach is further used to model the surface tension. Byl vyvinut termodynamický model popisující kapalnou a plynnou fázi vody. Model správně reprezentuje silné anomální chování podchlazené vody. Anomálie jsou způsobeny blízkostí kritického bodu kapalina-kapalina. Model aproximuje kapalnou vodu jako směs tvou soutěžících struktur (vysoko- a nízko-hustotní struktura) a kavit. Termodynamický stav je nalezen minimalizací Gibbsovy volné energie vzhledem k proporci obou struktur a počtu kavit. Tento přístup je dále použit pro modelování povrchového napětí.
Keywords: supercooled water; surface tension; thermodynamic properties
Project no.: CEZ:AV0Z20760514 (CEP), IAA2076203 (CEP)
Funding provider: GA AV ČR
Host item entry: Water, Steam, and Aqueous Solutions for Electric Power. Advances in Science and Technology, ISBN 4-621-07596-9

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/11104/0115840

Permalink: http://www.nusl.cz/ntk/nusl-32802


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Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers