Počet záznamů: 1
Current status of correlations for the surface tension of ordinary water
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SYSNO ASEP 0588167 Druh ASEP A - Abstrakt Zařazení RIV Záznam nebyl označen do RIV Zařazení RIV Není vybrán druh dokumentu Název Current status of correlations for the surface tension of ordinary water Tvůrce(i) Vinš, Václav (UT-L) RID, ORCID
Hrubý, Jan (UT-L) RID, ORCID
Součková, Monika (UT-L) RID, ORCID
Aminian, Ali (UT-L)
Celný, David (UT-L) ORCID
Blahut, Aleš (UT-L) RID, ORCIDCelkový počet autorů 6 Rok vydání 2024 Zdroj.dok. Twenty-Second Symposium on Thermophysical Properties and Eighteenth International Conference on the Properties of Water and Steam. - Boulder, 2024 Poč.str. 1 s. Forma vydání Online - E Akce Symposium on Thermophysical Properties /22./ and International Conference on the Properties of Water and Steam /18./ Datum konání 23.06.2024 - 28.06.2024 Místo konání Colorado Země US - Spojené státy americké Typ akce WRD Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova surface tension ; correlation ; international standard Obor OECD Thermodynamics CEP GA22-03380S GA ČR - Grantová agentura ČR Institucionální podpora UT-L - RVO:61388998 Anotace The international standard for the surface tension of ordinary water approved by IAPWS is based on the correlation by Vargaftik et al. introduced back in 1983. The IAPWS standard has been later adjusted to the International Temperature Scale of 1990 (ITS-90) and, based on the new experiments carried out under the metastable supercooled state, has been proved to provide reliable predictions even when extrapolated from 0 °C down to – 25 °C. Even though the IAPWS standard provide reliable predictions, it seems to suffer from three weaknesses: A) the uncertainty estimates appear rather high, e.g., 0.36 mN/m at 25 °C, B) in the high-temperature region reaching the critical point, the correlation is based on just two data sets published back in 1969 and 1973 by a single research group of Vargaftik, C) recent experiments carried out at temperatures down – 31 °C show slight deviation from the extrapolated IAPWS standard. In 2016, the research group of Pátek reported new experimental data from – 0.6 to 70 °C and developed new correlation for the surface tension of ordinary water with an estimated error of 0.1 mN/m. The mathematical formula is identical with the IAPWS standard. In 2015, Kalová and Mareš reviewed literature data for surface tension at 20 and 25 °C and recently developed another correlation for the surface tension of ordinary water with an additional term τ^1.76. The uncertainty is estimated between 0.1 and 0.2 mN/m depending on the temperature region. In this talk, we compare the available correlations and try to assess recent developments that could lead to a possible reduction in the uncertainty estimates of the current IAPWS standard for the surface tension of ordinary water. Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2025
Počet záznamů: 1