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Title: Progress with the 5D full-F continuum gyrokinetic code COGENT

Abstract

COGENT is an Eulerian gyrokinetic code being developed for edge plasma modelling. The code is distinguished by the use of a high-order finite-volume (conservative) discretization combined with mapped multi-block grid technology. Our recent work is focused on the development of a 5D full-F COGENT version.Anumerical algorithm utilizing locally a field-aligned multi-block coordinate system is implemented to facilitate simulations of highly anisotropic microturbulence in the presence of a strong magnetic shear. In this approach, the toroidal direction is divided into blocks such that,within each block, the cells are field-aligned and a non-matching (non-conformal) grid interface is allowed at the block boundaries. In this paper we report on details of the numerical implementation and present preliminary results of verification studies performed for the case of the ion temperature gradient (ITG) instability in a sheared toroidal annulus geometry.

Authors:
 [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1608095
Alternate Identifier(s):
OSTI ID: 1598370
Report Number(s):
LLNL-JRNL-786885
Journal ID: ISSN 0863-1042; CTPP; 983844
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Contributions to Plasma Physics
Additional Journal Information:
Journal Volume: 60; Journal Issue: 5-6; Journal ID: ISSN 0863-1042
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; finite-volume methods; gyrokinetics; tokamak edge

Citation Formats

Dorf, Mikhail, and Dorr, Milo. Progress with the 5D full-F continuum gyrokinetic code COGENT. United States: N. p., 2020. Web. doi:10.1002/ctpp.201900113.
Dorf, Mikhail, & Dorr, Milo. Progress with the 5D full-F continuum gyrokinetic code COGENT. United States. doi:https://doi.org/10.1002/ctpp.201900113
Dorf, Mikhail, and Dorr, Milo. Wed . "Progress with the 5D full-F continuum gyrokinetic code COGENT". United States. doi:https://doi.org/10.1002/ctpp.201900113. https://www.osti.gov/servlets/purl/1608095.
@article{osti_1608095,
title = {Progress with the 5D full-F continuum gyrokinetic code COGENT},
author = {Dorf, Mikhail and Dorr, Milo},
abstractNote = {COGENT is an Eulerian gyrokinetic code being developed for edge plasma modelling. The code is distinguished by the use of a high-order finite-volume (conservative) discretization combined with mapped multi-block grid technology. Our recent work is focused on the development of a 5D full-F COGENT version.Anumerical algorithm utilizing locally a field-aligned multi-block coordinate system is implemented to facilitate simulations of highly anisotropic microturbulence in the presence of a strong magnetic shear. In this approach, the toroidal direction is divided into blocks such that,within each block, the cells are field-aligned and a non-matching (non-conformal) grid interface is allowed at the block boundaries. In this paper we report on details of the numerical implementation and present preliminary results of verification studies performed for the case of the ion temperature gradient (ITG) instability in a sheared toroidal annulus geometry.},
doi = {10.1002/ctpp.201900113},
journal = {Contributions to Plasma Physics},
number = 5-6,
volume = 60,
place = {United States},
year = {2020},
month = {2}
}

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