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Visualization study on the thermohydrodynamic phenomena induced by pulsative heating in helium II by the use of a laser holographic interferometer.

Author(s) : IIDA T., MURAKAMI M., SHIMAZAKI T., NAGAI H.

Type of article: Article

Summary

The evolution of an initial trapezoidal thermal pulse into a thermal shock wave and the subsequent propagation is visualized at various temperatures. The temperature rise due to diffusive process caused by the action of high density vortices, that is the formation of a thermal boundary layer adjacent to the heater, and subsequent boiling are observed. The finite-amplitude pressure wave is found to be generated in response to the onset of pulsative heating. Further, a visualization of evaporation from an helium II free surface caused by the incidence of a thermal shock wave is made and the propagating speed of the vapour front is measured from visualization photos.

Details

  • Original title: Visualization study on the thermohydrodynamic phenomena induced by pulsative heating in helium II by the use of a laser holographic interferometer.
  • Record ID : 1997-2618
  • Languages: English
  • Source: Cryogenics - vol. 36 - n. 11
  • Publication date: 1996/11

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