TY  - JOUR
AU  - Tokar, Mikhail
AU  - Koltunov, Mikhail
TI  - 'Shell' approach to modeling of impurity spreading from localized sources in plasma
JO  - International journal of modeling, simulation, and scientific computing
VL  - 05
IS  - supp01
SN  - 1793-9623
CY  - Singapore {[u.a.]
PB  - World Scientific
M1  - FZJ-2014-06628
SP  - 1441005
PY  - 2014
AB  - 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.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1142/S1793962314410050
UR  - https://juser.fz-juelich.de/record/173217
ER  -