0000000000585378

AUTHOR

Galantucci L.

showing 2 related works from this author

Refrigeration bound of heat-producing cylinders by superfluid helium

2019

In this paper we go ahead in our studies on refrigeration of nanosystems by superfluid helium, as an appealing subject for future applications to computers or astronautical precision nanodevices. We first recall the effective thermal conductivity in laminar counterflow superfluid helium through arrays of mutually parallel cylinders and we discuss the conditions for the appearance of quantum turbulence around the heat-producing cylinders. We then consider the cooling of an array of heat-producing cylindrical nanosystems by means of superfluid-helium counterflow. We discuss the upper bound on heat removal set by avoidance of quantum turbulence and avoidance of phase transition to normal He I,…

Condensed Matter::Quantum GasesPhysics::Fluid Dynamicsthermal conductivity liquid helium quantum turbulence micropores quantized vortices computer refrigeration.Mathematics; PhysicsRefrigerationExtended Thermodynamicssuperfluid heliumPhysics::Atomic and Molecular Clusterslcsh:Science (General)Settore MAT/07 - Fisica MatematicaMSC: 76A25 76F99 80A99.lcsh:Q1-390
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The two-fluid extended model of superfluid helium

2019

In this paper we perform the first numerical comparison between the two main existing models of superfluid helium: the two-fluid model proposed by Landau and the one-fluid extended model proposed from the extended thermodynamics. The numerical experiments in this paper regard the profiles of the so-called normal and superfluid components in 2D counterflow turbulence.

two-fluid modelcounterflow turbulencesuperfluid heliumextended thermodynamicSettore MAT/07 - Fisica Matematicaone-fluid extended model
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