Scaling law: Difference between revisions

Scaling law (view source)

245 bytes added , 11 September 2009

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 === Size scaling ===
-The L-mode scaling is of the "Bohm" type, while the ELMy H-mode is of the "gyro-Bohm" type.
+Expressing the diffusivities in dimensionless form<ref name="ITER" />
-"Gyro-Bohm" scaling is what one would expect for diffusive transport based on a diffusive scale length proportional to &rho;<sub>i</sub> (the ion gyroradius). "Bohm" scaling, however, suggests that transport is not diffusive and not characterized by a typical scale length.
+:<math>D = c_s \rho_s (\rho^*)^\alpha F(\nu^*,\beta,q, ...)</math>
+When &alpha; = 0, the scaling is said to be of the Bohm type, and when &alpha; = 1, of the gyro-Bohm type.
+The L-mode scaling is of the Bohm type, while the ELMy H-mode is of the gyro-Bohm type.
+Gyro-Bohm scaling is what one would expect for diffusive transport based on a diffusive scale length proportional to &rho;<sub>i</sub> (the ion gyroradius). Bohm scaling, however, suggests that transport may not be diffusive and may not characterized by a typical scale length.
 (''More detail needed'')