Accession Number : AD0667602

Title :   ULTRASONIC CAVITATION IN LIQUID HELIUM.

Descriptive Note : Technical rept.,

Corporate Author : CALIFORNIA INST OF TECH PASADENA DIV OF ENGINEERING AND APPLIED SCIENCE

Personal Author(s) : Hsieh,Din-Yu

Report Date : MAR 1968

Pagination or Media Count : 20

Abstract : Based on the new interpretation that rotons behave like tiny quantized vortex rings, a theory is constructed to give a complete picture of ultrasonic cavitation in liquid helium. The problem of nuclei of cavitation is approached from a new direction. Questions like the lambda-peak of the audible threshold, the distinction among audible, incipient visible and desinent visible cavitation thresholds in He II, the lack of such distinction in He I, the reduction of audible threshold by rotation in He II and the absence of such reduction in He I, are satisfactorily explained. The relevance of the present theory to cavitation in ordinary liquids is briefly discussed. (Author)

Descriptors :   (*HELIUM, *CAVITATION), (*LIQUEFIED GASES, HELIUM), SUPERFLUIDITY, VORTICES, ULTRASONIC PROPERTIES, NUCLEI, ULTRASONIC RADIATION, ROTATION, QUANTUM THEORY, TENSILE PROPERTIES, THERMODYNAMICS, BUBBLES

Subject Categories : Fluid Mechanics
      Quantum Theory and Relativity
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE