Fluid Modelling with Drift Fluxes of Magnetic Field Reversal Experiments in Jet

摘要

Overall, many of the measured trends found with magnetic field reversal have been reproduced by the code, but generally with smaller changes than seen experimentally. Variation of the magnitude of the anomalous transport coefficients has shown improved results for lower values of D_⊥ and pinch velocity, with the former having a greater effect at the inner target and the latter at the outer target. For the work presented here the standard model was used for the anomalous transport coefficients which defines the coefficients globally and with only a poloidal variation possible. The results obtained thus far indicate that the anomalous transport should be reduced to allow the drift fluxes to exert a greater influence, but with the model used this requires a global reduction which has resulted in some problems of numerical stability. Future work to complete the study of the relevance of drifts on divertor asymmetries will require the evaluation of different models for anomalous transport. This, and work on the effects of drifts on impurity transport, not included in this paper, is in progress.