Surface Tension of Supercooled Water Down to -21°C Measured within a Horizontal Capillary Tube

0449194 - ÚT 2016 US eng A - Abstrakt
Vinš, Václav - Hošek, Jan - Hykl, Jiří - Hrubý, Jan
Surface Tension of Supercooled Water Down to -21°C Measured within a Horizontal Capillary Tube.
19th Symposium on Thermophysical Properties. Boulder Colorado: National Institute of Standards and Technology, 2015. PaperID 2611.
[Symposium on Thermophysical Properties /19./. 21.06.2015-26.06.2015, Boulder Colorado]
Grant CEP: GA MŠMT LG13056; GA ČR GJ15-07129Y
Institucionální podpora: RVO:61388998
Klíčová slova: capillary tube * horizontal measurement * supercooled water
Kód oboru RIV: BJ - Termodynamika
http://thermosymposium.nist.gov/pdf/Abstract_2611.pdf ; http://thermosymposium.nist.gov/program.html

New data for the surface tension of metastable supercooled water is presented in this study. A new experimental apparatus based on the measuring technique developed by Ferguson and Kennedy was designed and tested. A short liquid thread was located in a horizontal capillary tube. One end of the capillary tube was connected to the pressure setup with inert gas, while the other end was left open to ambient. The open end of the capillary tube was observed with an optical setup. A pre-set overpressure of inert gas applied to the closed end of the capillary tube gradually changed the liquid meniscus at the open end from concave to planar and subsequently to convex. The surface tension at the inner liquid meniscus was determined from the overpressure of inert gas corresponding to the flattened outer meniscus. The new data measured down to -21°C from the horizontal technique agrees well with our previous measurements performed with the modified capillary rise method.
Trvalý link: http://hdl.handle.net/11104/0254779