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Author Diribarne, P. ♦ Salort, J. ♦ Baudet, C. ♦ Belier, B. ♦ Castaing, B. ♦ Chevillard, L. ♦ Daviaud, F. ♦ David, S. ♦ Dubrulle, B. ♦ Gagne, Y. ♦ Girard, A. ♦ Rousset, B. ♦ Tabeling, P. ♦ Thibault, P. ♦ Willaime, H.
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword First Result ♦ Tsf Experiment ♦ High Reynold Number Turbulence ♦ Liquid Helium ♦ Second Sound Tweezer ♦ Heat Exchanger ♦ Semi-local Instrumentation ♦ Total Head Pressure Tube ♦ Closed Loop ♦ Passive Grid ♦ Global Characterization ♦ Turbulent Phenomenon ♦ High Reynolds Num-ha L-0 ♦ Temperature Stability ♦ Experimental Facility ♦ Helium Flow ♦ Total Head Pres-sure Tube ♦ Fragile Instrumentation ♦ Nominal Capacity ♦ Superfluid Turbulence ♦ Turbulence Intensity ♦ Cea Grenoble Refrigerator ♦ Cryogenic Pump ♦ Funda-mental Study ♦ Main Section ♦ Semi Local Measurement ♦ Sub-micrometer Anemometer ♦ Experimental Section
Abstract Summary. Superfluid turbulence (TSF) project uses liquid helium for the funda-mental study of turbulent phenomena behind a passive grid and is able to work both in HeI and in HeII. Local and semi-local instrumentation was developed specifically for the purpose of this experiment(e.g. sub-micrometer anemometer, total head pres-sure tube and second sound tweezer). The difficulties encountered with this local and fragile instrumentation are discussed. Global characterization of the flow is presented including velocity, pressure, temperature stability and turbulence intensity. Finally, first results obtained with semi local measurements (total head pressure tube and second sound tweezer) both in the two phases of helium are presented. 1 Experimental facility and sensors The experiment is a closed loop, containing three main sections: a pump, a heat exchanger and the experimental section. The helium flow is generated by the cryogenic pump. The temperature is controled by means of the heat exchanger immersed in a liquid Helium saturated bath. This experiment takes profit of the CEA Grenoble refrigerator (nominal capacity of 400 Watt at 1.8 K) to remove the heat due to the energy dissipated in this high Reynolds num-ha l-0
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study