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- Second_sound abstract "Second sound is a quantum mechanical phenomenon in which heat transfer occurs by wave-like motion, rather than by the more usual mechanism of diffusion.Heat takes the place of pressure in normal sound waves.This leads to a very high thermal conductivity.It is known as "second sound" because the wave motion of heat is similar to the propagation of sound in air.Normal sound waves are fluctuations in the density of molecules in a substance;second sound waves are fluctuations in the density of particle-like thermal excitations (rotons and phonons).Second sound can be observed in any system in which most phonon-phonon collisions conserve momentum.This occurs in superfluids, and also insome dielectric crystals when Umklapp scattering is small.(Umklapp phonon-phonon scattering exchanges momentum with the crystal lattice, so phonon momentum is not conserved.)".
- Second_sound wikiPageExternalLink 1973PhDT.......142S.
- Second_sound wikiPageExternalLink piram_ms.pdf.
- Second_sound wikiPageID "10685654".
- Second_sound wikiPageLength "9131".
- Second_sound wikiPageOutDegree "22".
- Second_sound wikiPageRevisionID "680189153".
- Second_sound wikiPageWikiLink Category:Quantum_mechanics.
- Second_sound wikiPageWikiLink Category:Thermodynamics.
- Second_sound wikiPageWikiLink Copper.
- Second_sound wikiPageWikiLink Diffusion.
- Second_sound wikiPageWikiLink European_Engineer.
- Second_sound wikiPageWikiLink Heat_transfer.
- Second_sound wikiPageWikiLink Helium.
- Second_sound wikiPageWikiLink Kelvin.
- Second_sound wikiPageWikiLink Lambda_point.
- Second_sound wikiPageWikiLink Liquid_helium.
- Second_sound wikiPageWikiLink Molecule.
- Second_sound wikiPageWikiLink Molecules.
- Second_sound wikiPageWikiLink Phonon.
- Second_sound wikiPageWikiLink Phonons.
- Second_sound wikiPageWikiLink Quantum_mechanical.
- Second_sound wikiPageWikiLink Quantum_mechanics.
- Second_sound wikiPageWikiLink Rollin_film.
- Second_sound wikiPageWikiLink Sound.
- Second_sound wikiPageWikiLink Superconducting_radio_frequency.
- Second_sound wikiPageWikiLink Superfluid.
- Second_sound wikiPageWikiLink Superfluidity.
- Second_sound wikiPageWikiLink Superfluids.
- Second_sound wikiPageWikiLink Thermal_conductivity.
- Second_sound wikiPageWikiLink Thermometer.
- Second_sound wikiPageWikiLink Third_sound.
- Second_sound wikiPageWikiLink Umklapp_scattering.
- Second_sound wikiPageWikiLink Wave_equation.
- Second_sound wikiPageWikiLinkText "Second sound".
- Second_sound wikiPageWikiLinkText "second sound".
- Second_sound wikiPageWikiLinkText "second".
- Second_sound hasPhotoCollection Second_sound.
- Second_sound subject Category:Quantum_mechanics.
- Second_sound subject Category:Thermodynamics.
- Second_sound hypernym Phenomenon.
- Second_sound type Disease.
- Second_sound type Concept.
- Second_sound type Mechanic.
- Second_sound type Physic.
- Second_sound type Thermodynamic.
- Second_sound comment "Second sound is a quantum mechanical phenomenon in which heat transfer occurs by wave-like motion, rather than by the more usual mechanism of diffusion.Heat takes the place of pressure in normal sound waves.This leads to a very high thermal conductivity.It is known as "second sound" because the wave motion of heat is similar to the propagation of sound in air.Normal sound waves are fluctuations in the density of molecules in a substance;second sound waves are fluctuations in the density of particle-like thermal excitations (rotons and phonons).Second sound can be observed in any system in which most phonon-phonon collisions conserve momentum.This occurs in superfluids, and also insome dielectric crystals when Umklapp scattering is small.(Umklapp phonon-phonon scattering exchanges momentum with the crystal lattice, so phonon momentum is not conserved.)".
- Second_sound label "Second sound".
- Second_sound sameAs Zweiter_Schall.
- Second_sound sameAs Segundo_sonido.
- Second_sound sameAs Bunyi_kedua.
- Second_sound sameAs Segundo_som.
- Second_sound sameAs m.02qm757.
- Second_sound sameAs Второй_звук_в_жидком_гелии.
- Second_sound sameAs Andra_ljudvågen.
- Second_sound sameAs Другий_звук.
- Second_sound sameAs Q233699.
- Second_sound sameAs Q233699.
- Second_sound wasDerivedFrom Second_sound?oldid=680189153.
- Second_sound isPrimaryTopicOf Second_sound.