Stability of iterated plasma edge transport solvers
Stability of iterated plasma edge transport solvers
The application of numerical transport solvers for the plasma boundary of magnetic fusion devices is related to the iterative approximation of a xed-point of a non-linear map. 2D (axisymmetric) or even 3D transport solvers are routinely applied for the quantication of steady state plasma ows. Howeve...
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Personal Name(s): | Frerichs, Heinke Gerd (Corresponding author) |
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Contributing Institute: |
Plasmaphysik; IEK-4 |
Published in: | 2013 |
Imprint: |
Jülich
Forschungszentrum Jülich GmbH, Zentralbibliothek, Verlag
2013
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Physical Description: |
42 pp. |
Document Type: |
Report Book |
Research Program: |
Plasma theory |
Series Title: |
Berichte des Forschungszentrums
4368 |
Link: |
OpenAccess |
Publikationsportal JuSER |
The application of numerical transport solvers for the plasma boundary of magnetic fusion devices is related to the iterative approximation of a xed-point of a non-linear map. 2D (axisymmetric) or even 3D transport solvers are routinely applied for the quantication of steady state plasma ows. However, unstable behavior is found under certain conditions. A simple two-point model is applied to demonstrate that this kind ofunstable behavior can occur when the xed-point looses stability, resulting in a period doubling route to chaos. Furthermore, wavelike oscillations can occur at low temperatures.An adaptive relaxation scheme is presented which allows to suppress discrete and wavelike oscillations in order to stabilize the xed-point iteration. |