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Parallel filtering in global gyrokinetic simulations
- Source :
-
Journal of Computational Physics . Feb2012, Vol. 231 Issue 3, p745-758. 14p. - Publication Year :
- 2012
-
Abstract
- Abstract: In this work, a Fourier solver [B.F. McMillan, S. Jolliet, A. Bottino, P. Angelino, T.M. Tran, L. Villard, Comp. Phys. Commun. 181 (2010) 715] is implemented in the global Eulerian gyrokinetic code GT5D [Y. Idomura, H. Urano, N. Aiba, S. Tokuda, Nucl. Fusion 49 (2009) 065029] and in the global Particle-In-Cell code ORB5 [S. Jolliet, A. Bottino, P. Angelino, R. Hatzky, T.M. Tran, B.F. McMillan, O. Sauter, K. Appert, Y. Idomura, L. Villard, Comp. Phys. Commun. 177 (2007) 409] in order to reduce the memory of the matrix associated with the field equation. This scheme is verified with linear and nonlinear simulations of turbulence. It is demonstrated that the straight-field-line angle is the coordinate that optimizes the Fourier solver, that both linear and nonlinear turbulent states are unaffected by the parallel filtering, and that the k ∥ spectrum is independent of plasma size at fixed normalized poloidal wave number. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00219991
- Volume :
- 231
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Journal of Computational Physics
- Publication Type :
- Academic Journal
- Accession number :
- 67514292
- Full Text :
- https://doi.org/10.1016/j.jcp.2011.01.029