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| Home > Publications database > 'Shell' approach to modeling of impurity spreading from localized sources in plasma |
| Journal Article | FZJ-2014-06628 |
;
2014
World Scientific
Singapore {[u.a.]
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Please use a persistent id in citations: doi:10.1142/S1793962314410050
Abstract: In fusion devices, strongly localized intensive sources of impurities may arise unexpectedly or can be created deliberately through impurity injection. The spreading of impurities from such sources is essentially three-dimensional and nonstationary phenomenon involving physical processes of extremely different time scales. Numerical modeling of such events is still a very challenging task even by using most modern computers. To diminish the calculation time drastically a "shell" model has been elaborated that allows to reduce equations for particle, parallel momentum and energy balances of various ion species to one-dimensional equations describing the time evolution of radial profiles for several most characteristic parameters. The assumptions of the "shell" approach are verified by comparing its predictions with a numerical solution of one-dimensional time-dependent transport equations.
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