FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2017631104> ?p ?o ?g. }

• W2017631104 abstract "Static He-II films which are locally disturbed are investigated with the two-fluid model. It is assumed that motion of the normal fluid is retarded by a viscous force per unit volume $rensuremath{omega}ensuremath{rho}{v}_{n}$, in which $r$ is a dimensionless viscosity parameter whose value in He-II films is shown to be ${10}^{2}ensuremath{le}rensuremath{le}{10}^{4}$. A general surface wave and thermal disturbance is propagated through the film by two wave modes: a third-sound wave and a new highly attenuated, wave; these are first redescribed. For arbitrary initial conditions, the amounts of each mode produced are derived for a general experimental case. In particular, conditions which will produce third sound alone and the new mode alone are derived as functions of temperature and $r$. It is shown that pure third sound is difficult to produce, since the requirements on phase between the surface wave and temperature excitations are not experimentally natural ones. It is shown that, when the film is locally disturbed with a pure thermal excitation varying as $mathrm{exp}iensuremath{omega}t$, both modes are excited equally and are 180ifmmode^circelsetextdegreefi{} out of phase, so that the net surface is undisturbed. When the film is locally disturbed with an isothermal pure pressure excitation, then for large viscous force on the normal fluid, almost all of the displacement is in the new mode. The motions of the film variables characteristic of each of the modes are analytically obtained in general, and described quantitatively for a particular case. In the new mode, the normal fluid and superfluid move with almost the same phases and velocities, and are 180ifmmode^circelsetextdegreefi{} out of phase with the surface wave. In the third-sound mode, the superfluid moves in phase with the surface waves but the normal-fluid motion is more complicated. The results are compared with Lifshitz's results on first and second sound in bulk helium." @default.
• W2017631104 created "2016-06-24" @default.
• W2017631104 creator A5006132805 @default.
• W2017631104 date "1967-09-05" @default.
• W2017631104 modified "2023-09-27" @default.
• W2017631104 title "Radiation of Sound in He-II Films" @default.
• W2017631104 cites W1984518964 @default.
• W2017631104 cites W1988546801 @default.
• W2017631104 cites W1995914103 @default.
• W2017631104 cites W1999669993 @default.
• W2017631104 cites W2017408836 @default.
• W2017631104 cites W2026883606 @default.
• W2017631104 cites W2029158271 @default.
• W2017631104 cites W2033328903 @default.
• W2017631104 cites W2039415524 @default.
• W2017631104 cites W2047839369 @default.
• W2017631104 cites W2057303788 @default.
• W2017631104 cites W2061082785 @default.
• W2017631104 cites W2061105000 @default.
• W2017631104 cites W2063321830 @default.
• W2017631104 cites W2073004783 @default.
• W2017631104 cites W2087397722 @default.
• W2017631104 cites W2090068574 @default.
• W2017631104 cites W2333564035 @default.
• W2017631104 doi "https://doi.org/10.1103/physrev.161.172" @default.
• W2017631104 hasPublicationYear "1967" @default.
• W2017631104 type Work @default.
• W2017631104 sameAs 2017631104 @default.
• W2017631104 citedByCount "1" @default.
• W2017631104 crossrefType "journal-article" @default.
• W2017631104 hasAuthorship W2017631104A5006132805 @default.
• W2017631104 hasConcept C121332964 @default.
• W2017631104 hasConcept C127172972 @default.
• W2017631104 hasConcept C133347239 @default.
• W2017631104 hasConcept C181500209 @default.
• W2017631104 hasConcept C184779094 @default.
• W2017631104 hasConcept C203718221 @default.
• W2017631104 hasConcept C24872484 @default.
• W2017631104 hasConcept C24890656 @default.
• W2017631104 hasConcept C26873012 @default.
• W2017631104 hasConcept C2779557605 @default.
• W2017631104 hasConcept C31686786 @default.
• W2017631104 hasConcept C44280652 @default.
• W2017631104 hasConcept C62520636 @default.
• W2017631104 hasConcept C83581075 @default.
• W2017631104 hasConcept C97355855 @default.
• W2017631104 hasConceptScore W2017631104C121332964 @default.
• W2017631104 hasConceptScore W2017631104C127172972 @default.
• W2017631104 hasConceptScore W2017631104C133347239 @default.
• W2017631104 hasConceptScore W2017631104C181500209 @default.
• W2017631104 hasConceptScore W2017631104C184779094 @default.
• W2017631104 hasConceptScore W2017631104C203718221 @default.
• W2017631104 hasConceptScore W2017631104C24872484 @default.
• W2017631104 hasConceptScore W2017631104C24890656 @default.
• W2017631104 hasConceptScore W2017631104C26873012 @default.
• W2017631104 hasConceptScore W2017631104C2779557605 @default.
• W2017631104 hasConceptScore W2017631104C31686786 @default.
• W2017631104 hasConceptScore W2017631104C44280652 @default.
• W2017631104 hasConceptScore W2017631104C62520636 @default.
• W2017631104 hasConceptScore W2017631104C83581075 @default.
• W2017631104 hasConceptScore W2017631104C97355855 @default.
• W2017631104 hasLocation W20176311041 @default.
• W2017631104 hasOpenAccess W2017631104 @default.
• W2017631104 hasPrimaryLocation W20176311041 @default.
• W2017631104 isParatext "false" @default.
• W2017631104 isRetracted "false" @default.
• W2017631104 magId "2017631104" @default.
• W2017631104 workType "article" @default.