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• Local model avoids nonphysical<br />
dithering transitions<br />
of the non-local model<br />
• Reasonably good description<br />
of the L-H transition<br />
• Fails to describe the fast fall<br />
in energy and density during<br />
H-L transition<br />
• Possible ways to improve<br />
model include:<br />
• Fine tuning of heat and<br />
particle transport within<br />
barrier;<br />
• Include radiation;<br />
• No validated multi-machine<br />
local model exists!<br />
V. Parail IOS ITPA Meeting, Kyoto, October 2011<br />
Comparison between “Global” and “Local” model<br />
( = 0.95)<br />
P NBI [MW]<br />
W th [MJ]<br />
crit.<br />
6<br />
4<br />
2<br />
0<br />
15<br />
10<br />
5<br />
0<br />
1,5<br />
1,0<br />
0,5<br />
0,0<br />
JET #72207: preliminary data<br />
Local model<br />
Non-local model<br />
52,0 52,5 53,0 53,5 54,0<br />
Time [s]<br />
10/13
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