DETERMINATION OF DIFFUSIVE AND NONDIFFUSIVE TRANSPORT IN MODULATION EXPERIMENTS IN PLASMAS
| Autor: | F. De Luca, Giuseppe Gorini, A. Jacchia, P. Mantica |
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| Přispěvatelé: | Jacchia, A, Mantica, P, De Luca, F, Gorini, G |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Wave propagation Computational Mechanics General Physics and Astronomy Energy flux Perturbation (astronomy) Mechanics Plasma Condensed Matter Physics PLASMA CONFINEMENT ENERGY TRANSPORT TEMPERATURE DEPENDENCE HEAT TRANSFER PLASMA INSTABILITY TRANSPORT PROCESSES PERTURBATION THEORY DIFFUSIVITY CYLINDRICAL CONFIGURATION WAVE PROPAGATION MAGNETIC CONFINEMENT SOURCES SINKS MODULATION INSTABILITY MASS TRANSFER Amplitude Classical mechanics ___ Mechanics of Materials Mass transfer Heat transfer Convection–diffusion equation FIS/03 - FISICA DELLA MATERIA |
| Zdroj: | ResearcherID Physics of fluids. B, Plasma physics (Online) 3 (1991): 3033. doi:10.1063/1.859781 info:cnr-pdr/source/autori:A. Jacchia (1); P. Mantica (1); F. De Luca (2); and G. Gorini (2)/titolo:Determination of diffusive and nondiffusive transport in modulation experiments in plasmas/doi:10.1063%2F1.859781/rivista:Physics of fluids. B, Plasma physics (Online)/anno:1991/pagina_da:3033/pagina_a:/intervallo_pagine:3033/volume:3 |
| DOI: | 10.1063/1.859781 |
| Popis: | The problem of the propagation of a harmonic temperature perturbation in a plasma with both diffusive and nondiffusive energy transport is addressed. The energy flux is modeled by two (radially varying) effective coefficients for the diffusive and nondiffusive transport, and the effects of perturbed energy sinks and of cylindrical geometry are taken into account. A simple, local relationship is found between the two transport coefficients and the gradients of the phase and amplitude of the temperature perturbation. This relationship can be used for the interpretation of heating modulation experiments, provided data at different modulation frequencies are available. Since a harmonic density perturbation in a plasma follows a similar linearized transport equation, a similar model can be applied also to density modulation experiments. |
| Databáze: | OpenAIRE |
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