Search results for "ballistic regime"

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HEAT FLUX IN SUPERFLUID TRANSITION AND IN TURBULENT HELIUM COUNTERFLOW

Normal fluid profileRadial flow Vortex diffusionTwo-fluid modelHelium 4Ballistic regimeInhomogeneous vortex tangles.lambda TransitionHeat transferQuantized vorticeEffective thermal conductivityTurbulent superfluid helium ( He II)One-fluid modelExtended Irreversible ThermodynamicEntrance regionSettore MAT/07 - Fisica MatematicaLongitudinal flow
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Generalized heat equation and transitions between different heat-transport regimes in narrow stripes

2019

Abstract In the framework of weakly nonlocal thermodynamic theory, in this paper we derive a nonlocal and nonlinear heat-transport equation beyond the Fourier law by means of thermodynamic considerations in agreement with the second law. The obtained equation describes the transitions among different heat-transport regimes. The stability of the solution of that equation is also analyzed in a special case.

diffusive regimegeneralized heat equation05.70.Ln46.05.+b02 engineering and technologyballistic regime01 natural sciencesStability (probability)010305 fluids & plasmasphonon-hydrodynamic regime0203 mechanical engineering0103 physical sciencesGeneral Materials ScienceSpecial caseCivil and Structural EngineeringPhysicsMechanical EngineeringBallistic regimeCondensed Matter PhysicsNonlinear system020303 mechanical engineering & transportsClassical mechanics66.70.-fMechanics of MaterialsFourier lawHeat equationgeneralized heat equation; diffusive regime; phonon-hydrodynamic regime; ballistic regimeMechanics Research Communications
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