Back to Search
Start Over
A quasi-linear analysis of the impurity effect on turbulent momentum transport and residual stress
- Publication Year :
- 2015
-
Abstract
- We study the impact of impurities on turbulence driven intrinsic rotation (via residual stress) in the context of the quasi-linear theory. A two-fluid formulation for main and impurity ions is employed to study ion temperature gradient modes in sheared slab geometry modified by the presence of impurities. An effective form of the parallel Reynolds stress is derived in the center of mass frame of a coupled main ion-impurity system. Analyses show that the contents and the radial profile of impurities have a strong influence on the residual stress. In particular, an impurity profile aligned with that of main ions is shown to cause a considerable reduction of the residual stress, which may lead to the reduction of turbulence driven intrinsic rotation.
- Subjects :
- Materials science
Center-of-momentum frame
Turbulence
FOS: Physical sciences
Context (language use)
Mechanics
Reynolds stress
Condensed Matter Physics
Rotation
Physics - Plasma Physics
Plasma Physics (physics.plasm-ph)
Momentum
Residual stress
Impurity
Condensed Matter::Strongly Correlated Electrons
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....d88e178b144fe17305dafdea88d2ec09