| Issue |
Europhys. Lett.
Volume 43, Number 1, July I 1998
|
|
|---|---|---|
| Page(s) | 29 - 34 | |
| Section | Classical areas of phenomenology | |
| DOI | https://doi.org/10.1209/epl/i1998-00314-9 | |
| Published online | 01 September 2002 | |
Local investigation of superfluid turbulence
Laboratoire de Physique Statistique, Ecole Normale Supérieure,
24 rue Lhomond, 75231 Paris, France
Received:
2
February
1998
Accepted:
8
May
1998
We investigate flows of helium IV driven by two counter-rotating
disks, in a range of temperatures varying between 1.4 and 2.3 K. The
local pressure fluctuations obtained on a small total-head tube are
analyzed. Above 
, the sensor
allows to measure the local velocity fluctuations, and below , it
determines the local fluctuations of a linear combination of the
normal and superfluid flow components. Above and below ,
Kolmogorov spectra are clearly obtained, with similar Kolmogorov
constants. Evidence for persistence of inertial range intermittency
in the superfluid region is presented. At all temperatures below ,
the structure function
exponents are found indistinguishable
from those currently observed in normal fluid turbulence.
PACS: 47.27.Gs – Isotropic turbulence; homogeneous turbulence / 47.27.Jv – High-Reynolds-number turbulence
© EDP Sciences, 1998
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