Hydrodynamique et Turbulence de l'hélium
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- Moyens d'étude
- L'hydrodynamique des superfluides
- La convection turbulente
- Vers les très hauts nombres de Reynolds
- Instrumentation et nano-capteurs
- Anémométres à micro-poutrelle
- Réseau de micro-thermomètres
- Thermomètres microniques suspendus
- Capteurs de pression miniature, Tubes de Pitot sub-millimétriques
- Pinces à second son miniature
- Anémomètres microniques avec quelques MHz de dynamique
- Débitmère pour Helium gazeux cryogénique
- Densimétrie cryogénique de précision
- Thermocouple cryogénique
- Moteur pas-à-pas cryogénique
- ( Régulation électronique DC-2 MHz 15 bits )
- ( Electronique cryogénique )
Data available online for downloads
Superfluid turbulence Experiments
- Vortex density spectrum in quantum turbulence at 1.6K
figure published in : Roche et al. (2007) EPL 7766002 - Velocity spectrum and velocity histogram (pdf) in quantum turbulence (1.56 K) versus classical turbulence (2.2 K)
figure published in : Salort et al. (2012) EPL 9734006
Superfluid turbulence Simulations
Convection turbulence Experiments
- Heat transfer in a 43-cm-high, aspect-ratio 0.23 cell with slightly rough (sand blasted) non-flat plates (4 cirques machined in each plate)
for reference see proceeding Kaiser, R. et al. (2011) Advances in Turbulence XIIIxx:xxx - Heat transfer in a 43-cm-high, aspect-ratio 0.23 cell (called the Cigar cell in the reference below)
for reference : see page 3 of Roche, X. et al. (2010) New J. Phys 12:085014 - Heat transfer in a 8.8-cm-high, aspect-ratio 1.14 cell (called the Short cell in the reference below)
for reference : see page 3 of Roche, X. et al. (2010) New J. Phys 12:085014 - Heat transfer in a 20-cm-high, aspect-ratio 0.5 cell (called the Flange cell in the reference below)
for reference : see page 3 of Roche, X. et al. (2010) New J. Phys 12:085014 - Heat transfer in a 20-cm-high, aspect-ratio 0.5 cell (called the Vintage cell in the reference below)
for reference see page 3 of Roche, X. et al. (2010) New J. Phys 12:085014 - Heat transfer in a 20-cm-high, aspect-ratio 0.5 cell (called the Paper cell in the reference below)
for reference : see page 3 of Roche, X. et al. (2010) New J. Phys 12:085014 - Heat transfer in a 20-cm-high, aspect-ratio 0.5 cell - Plates : rough, made of Cu
figures published first in : Roche et al. (2001) Phys. Rev. E 63 045303 (R)
data table never published - Heat transfer in a 20-cm-high, aspect-ratio 0.5 cell with a Brass-bottom-plate, with rough or smooth inner surfaces
figures published first in : Roche et al. (2005) Phys. Fluids 17 115107
data table never published - Heat transfer in a 2-cm-high, aspect-ratio 0.5 cell
figures published first in : Roche, P.-E. et al. (2002) Europhys. Lett. 58 693
data table published in : Roche, P.-E. et al. (2004) J. Low Temp. Phys. 134 1011
Ph.R. Jan, 2012