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Title: Fluid pinch-off in superfluid and normal {sup 4}He

Abstract

We present frames from high-speed videos of the pinch-off of liquid {sup 4}He droplets. The temperature of the fluid droplets ranged from 1.33 K to 4.8 K, and the size of the drops was proportional to the temperature-dependent capillary length. We observed no qualitative difference between pinch-off in the normal and superfluid states. In both cases, the shape of the fluid in the final stages of pinch-off resembles a cone piercing a sphere, which is typical of other low-viscosity fluids. The evolution of the minimum neck radius r{sub min} can be characterized by power laws r{sub min}{proportional_to}{tau}{sup n}, where {tau} is the time remaining until pinch-off occurs. In the regime near pinch-off, the data from image analysis are consistent with n=2/3. The data at the beginning of the pinch process when the neck is of the order of the capillary length are also described by n=2/3, but with a different proportionality factor. There is an intermediate crossover regime characterized by n=2/5.

Authors:
; ;  [1]
  1. Department of Physics and Astronomy, University of California, Irvine, California 92697-4575 (United States)
Publication Date:
OSTI Identifier:
21072404
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; Journal Volume: 75; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevE.75.036311; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CAPILLARIES; DROPLETS; HELIUM 4; IMAGE PROCESSING; LIQUIDS; SUPERFLUIDITY; TEMPERATURE DEPENDENCE; VELOCITY; VISCOSITY

Citation Formats

Burton, J. C., Rutledge, J. E., and Taborek, P.. Fluid pinch-off in superfluid and normal {sup 4}He. United States: N. p., 2007. Web. doi:10.1103/PHYSREVE.75.036311.
Burton, J. C., Rutledge, J. E., & Taborek, P.. Fluid pinch-off in superfluid and normal {sup 4}He. United States. doi:10.1103/PHYSREVE.75.036311.
Burton, J. C., Rutledge, J. E., and Taborek, P.. Thu . "Fluid pinch-off in superfluid and normal {sup 4}He". United States. doi:10.1103/PHYSREVE.75.036311.
@article{osti_21072404,
title = {Fluid pinch-off in superfluid and normal {sup 4}He},
author = {Burton, J. C. and Rutledge, J. E. and Taborek, P.},
abstractNote = {We present frames from high-speed videos of the pinch-off of liquid {sup 4}He droplets. The temperature of the fluid droplets ranged from 1.33 K to 4.8 K, and the size of the drops was proportional to the temperature-dependent capillary length. We observed no qualitative difference between pinch-off in the normal and superfluid states. In both cases, the shape of the fluid in the final stages of pinch-off resembles a cone piercing a sphere, which is typical of other low-viscosity fluids. The evolution of the minimum neck radius r{sub min} can be characterized by power laws r{sub min}{proportional_to}{tau}{sup n}, where {tau} is the time remaining until pinch-off occurs. In the regime near pinch-off, the data from image analysis are consistent with n=2/3. The data at the beginning of the pinch process when the neck is of the order of the capillary length are also described by n=2/3, but with a different proportionality factor. There is an intermediate crossover regime characterized by n=2/5.},
doi = {10.1103/PHYSREVE.75.036311},
journal = {Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics},
number = 3,
volume = 75,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}