Share

LIGHT INDUCED ENHANCEMENT OF TRANSIENT HEAT TRANSFER FROM A SOLID INTO LIQUID HELIUM I.

Author(s) : SINHA D. N.

Type of article: Article

Summary

WHEN A SINGLE CRYSTAL OF BISMUTH IS RAPIDLY HEATED ABOVE A CERTAIN THRESHOLD TEMPERATURE IN A BATH OF LIQUID HELIUM BY A STEP-FUNCTION ELECTRIC CURRENT, THE APPLICATION OF A LIGHT PULSE OF INTENSITY 1 TO 200 MW PER CM2 AND DURATION 2 MICROSECONDS TO 1 MILLISECOND CAUSES A DECREASE OF UP TO 75% IN THE TOTAL CRYSTAL SUPERHEAT TEMPERATURE WITHIN 3 MILLISECONDS. THE THRESHOLD TEMPERATURE IS LESS THAN THE HOMOGENEOUS NUCLEATION TEMPERATURE OF LIQUID HELIUM. MARKED INCREASE IN HEAT TRANSFER IS BELIEVED TO BE CAUSED BY INCREASED BUBBLE ACTIVITY DUE TO THE LIGHT INDUCED RAPID NUCLEATION OF BUBBLES NEAR THE INTERFACE. SEVERAL HYPOTHESES ARE PRESENTED AND DISCUSSED.

Details

  • Original title: LIGHT INDUCED ENHANCEMENT OF TRANSIENT HEAT TRANSFER FROM A SOLID INTO LIQUID HELIUM I.
  • Record ID : 1983-0445
  • Languages: English
  • Source: Cryogenics - vol. 22 - n. 6
  • Publication date: 1982

Links


See other articles in this issue (7)
See the source

Indexing