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→Physical mechanism
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The sheared flow can be generated by the turbulence itself via the Reynolds Stress mechanism. | The sheared flow can be generated by the turbulence itself via the Reynolds Stress mechanism. | ||
<ref>[http://dx.doi.org/10.1088/0741-3335/43/10/308 S.B. Korsholm et al, ''Reynolds stress and shear flow generation'', Plasma Phys. Control. Fusion '''43''' (2001) 1377-1395]</ref> | <ref>[http://dx.doi.org/10.1088/0741-3335/43/10/308 S.B. Korsholm et al, ''Reynolds stress and shear flow generation'', Plasma Phys. Control. Fusion '''43''' (2001) 1377-1395]</ref> | ||
The details of this mechanism are the subject of ongoing studies. | The details of this feedback mechanism are the subject of ongoing studies. | ||
<ref>[http://link.aip.org/link/?PHPAEN/16/012504/1 M.A. Malkov and P.H. Diamond, ''Weak hysteresis in a simplified model of the L-H transition'', Phys. Plasmas '''16''' (2009) 012504]</ref> | <ref>[http://link.aip.org/link/?PHPAEN/16/012504/1 M.A. Malkov and P.H. Diamond, ''Weak hysteresis in a simplified model of the L-H transition'', Phys. Plasmas '''16''' (2009) 012504]</ref> | ||
However, other factors can also contribute, such as the viscous damping, which might explain the dependence on rational surfaces observed in the stellarator W7-AS. | However, other factors can also contribute, such as the viscous damping, which might explain the dependence on rational surfaces observed in the stellarator W7-AS. | ||