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VISUAL OBSERVATIONS AND FILM RECORDING OF TWO-PHASE COUNTERFLOW PHENOMENA IN A HELIUM 4-CYCLING DILUTION REFRIGERATOR.

Author(s) : GRIFFIOEN W., JENTINK H. W., BRUYN-OUBOTER R. de

Type of article: Article

Summary

MEASUREMENTS ARE PRESENTED OF TWO-PHASE COUNTERFLOW PHENOMENA IN A HELIUM 4-CIRCULATING DILUTION REFRIGERATOR. IN A MIXING CHAMBER OF THE OVERFLOW TYPE A LOWEST TEMPERATURE OF 120 MILLIK IS REACHED (AT A VERY LOW FLOW RATE) ; MOST OF THE DILUTED PHASE IS FLOWING ALONGTHE WALL OF THE COUNTERFLOW CAPILLARY. AFTER MOUNTING A SIMPLE FLOW BREAKER ON TOP OF THE COUNTERFLOW CAPILLARY A FLOW OF DROPLETS APPEARS AND A LOWEST TEMPERATURE OF 30 MILLIK IS REACHED (AT HIGH FLOW RATES). THE TEMPERATURES ARE CONSISTENT WITH ESTIMATIONS USING A DROPLET FLOW THEORY AND A MEASURED HEAT LEAK OF 4 MICROW.

Details

  • Original title: VISUAL OBSERVATIONS AND FILM RECORDING OF TWO-PHASE COUNTERFLOW PHENOMENA IN A HELIUM 4-CYCLING DILUTION REFRIGERATOR.
  • Record ID : 1988-0869
  • Languages: English
  • Source: Physica, B - vol. 141
  • Publication date: 1986

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