DOI: 10.1063/1.859529 ISSN:
Influence of sheared poloidal rotation on edge turbulence
H. Biglari, P. H. Diamond, P. W. Terry- Fluid Flow and Transfer Processes
- General Physics and Astronomy
- Mechanics of Materials
- Condensed Matter Physics
- Computational Mechanics
The impact of radially sheared poloidal flows on ambient edge turbulence in tokamaks is investigated analytically. In the regime where poloidal shearing exceeds turbulent radial scattering, a hybrid time scale weighted toward the former is found to govern the decorrelation process. The coupling between radial and poloidal decorrelation results in a suppression of the turbulence below its ambient value. The turbulence quench mechanism is found to be insensitive to the sign of either the radial electric field or its shear.