Inertial confinement fusion and specifically shock ignition involve temperatures and temperature gradients for which the classical Spitzer-Harm thermal conduction breaks down and a non-local operator is required. In this article, two non-local electron thermal conduction models are tested against kinetic Vlasov-Fokker-Planck simulations. Both models are shown to reproduce the main features of thermal heat front propagation at kinetic timescales. The reduction of the thermal conductivity as a function of the scalelength of the temperature gradient is also recovered. Comparisons at nanosecond timescales show that the models agree on the propagation velocity of the heat front, but major differences appear in the thermal precursor. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4789878]

Comparison for non-local hydrodynamic thermal conduction models / Marocchino, Alberto; M., Tzoufras; Atzeni, Stefano; Schiavi, Angelo; Ph D., Nicolai; J., Mallet; V., Tikhonchuk; J. L., Feugeas. - In: PHYSICS OF PLASMAS. - ISSN 1070-664X. - STAMPA. - 20:2(2013), p. 022702. [10.1063/1.4789878]

Comparison for non-local hydrodynamic thermal conduction models

MAROCCHINO, ALBERTO;ATZENI, Stefano;SCHIAVI, ANGELO;
2013

Abstract

Inertial confinement fusion and specifically shock ignition involve temperatures and temperature gradients for which the classical Spitzer-Harm thermal conduction breaks down and a non-local operator is required. In this article, two non-local electron thermal conduction models are tested against kinetic Vlasov-Fokker-Planck simulations. Both models are shown to reproduce the main features of thermal heat front propagation at kinetic timescales. The reduction of the thermal conductivity as a function of the scalelength of the temperature gradient is also recovered. Comparisons at nanosecond timescales show that the models agree on the propagation velocity of the heat front, but major differences appear in the thermal precursor. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4789878]
01 Pubblicazione su rivista::01a Articolo in rivista
Comparison for non-local hydrodynamic thermal conduction models / Marocchino, Alberto; M., Tzoufras; Atzeni, Stefano; Schiavi, Angelo; Ph D., Nicolai; J., Mallet; V., Tikhonchuk; J. L., Feugeas. - In: PHYSICS OF PLASMAS. - ISSN 1070-664X. - STAMPA. - 20:2(2013), p. 022702. [10.1063/1.4789878]
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/507250
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 46
  • ???jsp.display-item.citation.isi??? 45
social impact