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→Physical mechanism
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A variety of mechanisms can give rise to sheared flow. | A variety of mechanisms can give rise to sheared flow. | ||
The main process for sheared flow generation is generation by the turbulence itself via the [[Reynolds stress]] mechanism. | The main process for sheared flow generation is generation by the turbulence itself via the [[Reynolds stress]] mechanism. | ||
Simply put, transport generated by the fluctuations produces a radial current ''j<sub>r</sub>'' that spins up the plasma via the ''j'' × ''B'' [[:Wikipedia:Lorentz force|Lorentz force]]. | |||
<ref>[http://dx.doi.org/10.1063/1.859681 P.H. Diamond and Y.-B. Kim, ''Theory of mean poloidal flow generation by turbulence'', Phys. Fluids B '''3''' (1991) 1626]</ref> | <ref>[http://dx.doi.org/10.1063/1.859681 P.H. Diamond and Y.-B. Kim, ''Theory of mean poloidal flow generation by turbulence'', Phys. Fluids B '''3''' (1991) 1626]</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> | <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> | ||