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- W2184802783 abstract "The spectrum of surface waves in superfluid helium is calculated for the case when there is a constant nondissipative heat flow in helium parallel to the surface. The presence of such a flow decreases the frequency of surface waves and can even make the flat surface unstable. Experimental investigations of standing second-sound waves in superfluid helium with free surface have shown that increase in wave amplitude leads to instability of the surface 111. Oscillations whose frequency is much less than that of the second-sound wave develop. It seems worth mentioning that in the experiment the second sound is emitted by an a.c.-heated electric wire. Therefore not only a second sound but also a steady heat flow is emitted. One becomes naturally interested in how the constant nondissipative heat flow parallel to the surface influences the spectrum of surface waves on superfluid and whether it can make the flat surface unstable. The present letter is devoted to investigation of this problem. In the general case a superfluid liquid with free surface can be described by the Lagrangian" @default.
- W2184802783 created "2016-06-24" @default.
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- W2184802783 date "1991-01-01" @default.
- W2184802783 modified "2023-09-27" @default.
- W2184802783 title "Instability of Superfluid Helium Free Surface in the Presence of Heat Flow." @default.
- W2184802783 hasPublicationYear "1991" @default.
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