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Author: Mikhail A Dorf
Requested Type: Poster
Submitted: 2016-02-12 11:38:24

Co-authors: M. Dorr (LLNL), R. H. Cohen (CompX), W. Lee (UCSD), D. Ghosh (LLNL), J. A. Hittinger (LLNL), and T. D. Rognlien (LLNL)

Contact Info:
7000 East Ave
Livermore, California   94550

Abstract Text:
We describe recent advances in cross-separatrix and other edge-relevant plasma simulations with COGENT, a continuum gyro-kinetic code being developed by the Edge Simulation Laboratory (ESL) collaboration. Work to date has been primarily focused on a 4D (axisymmetric) divertor version that models transport properties of edge plasmas including the effects of nonlinear (Fokker-Planck) collisions, anomalous radial transport and a self-consistent radial electric field. Recent work has focused on including the effects of poloidal electric fields in cross-separatrix simulations. We have also begun development of a 5D version to study edge turbulence, with initial focus on kinetic effects on blob dynamics and drift-wave instability. Finally, we report on recent progress with development and implementation of implicit-explicit (IMEX) time integration schemes and integrated modeling capabilities.
*Work performed for USDOE, at LLNL under contract DE-AC52-07NA27344.