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@ARTICLE{Kotov:829402,
author = {Kotov, Vladislav},
title = {{P}article conservation in numerical models of the tokamak
plasma edge},
journal = {Physics of plasmas},
volume = {24},
number = {4},
issn = {1089-7674},
address = {[S.l.]},
publisher = {American Institute of Physics},
reportid = {FZJ-2017-03115},
pages = {042511 -},
year = {2017},
abstract = {The test particle Monte-Carlo models for neutral particles
are often used in the tokamak edge modelling codes. The
drawback of these models is that the self-consistent
solution suffers from random error introduced by the
statistical method. A particular case where the onset of
nonphysical solutions can be clearly identified is the
violation of the global particle balance due to
non-converged residuals. There are techniques that can
reduce the residuals—such as internal iterations in the
code B2-EIRENE—but they may pose severe restrictions on
the time-step and slow down the computations. Numerical
diagnostics described in this paper can be used to
unambiguously identify when the too large error in the
global particle balance is due to finite-volume residuals,
and their reduction is absolutely necessary. Algorithms that
reduce the error while allowing large time-step are also
discussed.},
cin = {IEK-4},
ddc = {530},
cid = {I:(DE-Juel1)IEK-4-20101013},
pnm = {174 - Plasma-Wall-Interaction (POF3-174)},
pid = {G:(DE-HGF)POF3-174},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000400390700054},
doi = {10.1063/1.4980858},
url = {https://juser.fz-juelich.de/record/829402},
}