Rotation Profiles in DIII-D From Neoclassical Viscosity

Radial and poloidal profiles of rotation and density are calculated using neoclassical viscosity for a variety of discharges in DIII-D. Several confinement regimes (\underline {L}-mode, \underline {L}-mode with \underline {I}nternal \underline {T}ransport \underline {B}arrier, \underline {H}-mode, and \underline {H}-mode with \underline {Q}uiescent \underline {D}ouble \underline {B}arrier) are investigated. Predicted toroidal velocities agree reasonably well with measured values for all regimes. Poloidal density asymmetries remain within 10-20{\%} of the flux-surface average value. Toroidal velocity is shown to have a poloidal profile rather than rotating rigidly. Transport of angular momentum is shown to arise mostly from gyroviscosity whilst leaving room for other (anomalous) transport mechanisms.