Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session H71: Poster Session I (2:00pm - 4:00pm)
2:00 PM,
Tuesday, March 16, 2021
Abstract: H71.00013 : Two-scale factor universality in O2: experiments under density gradient*
Presenter:
Seth Zoppelt
(College of Charleston)
Authors:
Seth Zoppelt
(College of Charleston)
Ana Oprisan
(College of Charleston)
Gurunath Gandikota
(Université Grenoble Alpes and DSBT, IRIG, CEA)
Denis Chatain
(Université Grenoble Alpes and DSBT, IRIG, CEA)
Daniel Beysens
(Physique et Mécanique des Milieux Hétérogènes, CNRS, ESPCI Paris, PSL University - Sorbonne Université)
Yves Garrabos
(Bordeaux INP, ICMCB, UMR, Université de Bordeaux)
of a critical fluid sample under magnetic compensation of gravity as provided by a
solenoid can give turbidity data with the same precision as the classical
techniques using a laser beam. The novelty of this technique is noticeable as it
also authorizes both a detailed observation of the sample and the local
measurement. When density gradients exist, as it is often the case in space
experiments, different image zones can be chosen and compared, the more turbid zone
corresponding to a density closest to the critical density. It was shown that light
turbidity data, a quantity due to density -induced refractive index fluctuations,
could be directly obtained from image analysis. As an example, images of oxygen
taken near their critical temperatures of 155K are analyzed and values of
isothermal compressibility and fluctuation correlation lengths are compared with
literature values.
*Palmetto Grant- Palmetto Academy
South Carolina Space Grant Consortium grant “Two-scale factor universality in O2 and H2”
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