This title appears in the Scientific Report :
2011
Please use the identifier:
http://dx.doi.org/10.1016/j.jnucmat.2010.12.010 in citations.
Relevance of Collisionality in the Transport Model Assumptions for Divertor Detachment Multi-Fluid Modelling on JET
Relevance of Collisionality in the Transport Model Assumptions for Divertor Detachment Multi-Fluid Modelling on JET
A revised formulation of the perpendicular diffusive transport model in 2D multi-fluid edge codes is proposed. Based on theoretical predictions and experimental observations a dependence on collisionality is introduced into the transport model of EDGE2D-EIRENE. The impact on time-dependent JET gas f...
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Personal Name(s): | Wiesen, S. |
---|---|
Fundamenski, W. / Wischmeier, W. / Groth, M. / Brezinsek, S. / Naulin, V. | |
Contributing Institute: |
Plasmaphysik; IEK-4 |
Published in: | Journal of nuclear materials, 415 (2011) 1, S. S535 - S539 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2011
|
Physical Description: |
S535 - S539 |
DOI: |
10.1016/j.jnucmat.2010.12.010 |
Document Type: |
Journal Article |
Research Program: |
Fusion |
Series Title: |
Journal of Nuclear Materials
415 |
Subject (ZB): | |
Publikationsportal JuSER |
A revised formulation of the perpendicular diffusive transport model in 2D multi-fluid edge codes is proposed. Based on theoretical predictions and experimental observations a dependence on collisionality is introduced into the transport model of EDGE2D-EIRENE. The impact on time-dependent JET gas fuelled ramp-up scenario modelling of the full transient from attached divertor into the high-recycling regime, following a target flux roll over into divertor detachment, ultimately ending in a density limit is presented. A strong dependence on divertor geometry is observed which can mask features of the new transport model: a smoothly decaying target recycling flux roll over, an asymmetric drop of temperature and pressure along the field lines as well as macroscopic power dependent plasma oscillations near the density limit which had been previously observed also experimentally. The latter effect is strongest for scenarios with strike points on vertical targets and vanishes in case of asymmetric divertor configurations. (C) 2011 EURATOM. Published by Elsevier B.V. All rights reserved. |