Steady-state pressure drop and heat transfer in He II forced flow at high Reynolds number

✍ Scribed by S. Fuzier; B. Baudouy; S.W. Van Sciver

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 213 KB
• Volume: 41
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/s0011-2275(01)00090-x

✦ Synopsis

An experiment to study forced ¯ow super¯uid helium (He II) at high Reynolds number has been recently developed at the national high magnetic ®eld laboratory (NHMFL). The liquid is pushed from a bellows pump through a 1 m long, 9.8 mm inside diameter smooth tube test section to attain a maximum velocity of 18 m/s and a Reynolds number up to 2 Â 10 7 . The test section is instrumented with eight bare chip thermometers, a heater and a dierential pressure transducer. Measurements of pressure drop have been performed to determine the friction factor for Reynolds number exceeding 10 7 . These are compared to results from previous forced ¯ow experiments at lower velocities and to some existing correlations. The temperature rise in He II forced ¯ow, due to the isenthalpic expansion in the test section, has also been measured for velocities between 0.5 and 16 m/s. These temperature pro®les are related to the Joule±Thomson coecient. The heater, positioned in the middle of the test section, allows heat transfer measurements and can be used as a thermal ¯ow meter.