The nonlinear gyro-kinetic flux tube code GKW

Peeters, AG; Camenen, Y; Casson, FJ; Hornsby, WA; Snodin, AP; Strintzi, D; Szepesi, G

dc.contributor.author	Peeters, AG	en
dc.contributor.author	Camenen, Y	en
dc.contributor.author	Casson, FJ	en
dc.contributor.author	Hornsby, WA	en
dc.contributor.author	Snodin, AP	en
dc.contributor.author	Strintzi, D	en
dc.contributor.author	Szepesi, G	en
dc.date.accessioned	2014-03-01T01:32:10Z
dc.date.available	2014-03-01T01:32:10Z
dc.date.issued	2009	en
dc.identifier.issn	0010-4655	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20059
dc.subject	Drift wave	en
dc.subject	Flux tube	en
dc.subject	Gyro-kinetic	en
dc.subject	Plasma turbulence	en
dc.subject	Tokamak	en
dc.subject.classification	Computer Science, Interdisciplinary Applications	en
dc.subject.classification	Physics, Mathematical	en
dc.subject.other	Catalogue identifiers	en
dc.subject.other	Code structure	en
dc.subject.other	Distributed program	en
dc.subject.other	Drift wave	en
dc.subject.other	Electromagnetic effects	en
dc.subject.other	Explicit time integration	en
dc.subject.other	Finite difference	en
dc.subject.other	Flux tube	en
dc.subject.other	Flux tubes	en
dc.subject.other	FORTRAN 95	en
dc.subject.other	Grid points	en
dc.subject.other	Gyro-kinetic	en
dc.subject.other	Ireland	en
dc.subject.other	Kinetic electrons	en
dc.subject.other	Kinetic equations	en
dc.subject.other	Kinetic fluxes	en
dc.subject.other	Kinetic models	en
dc.subject.other	Kinetic simulation	en
dc.subject.other	Linear problems	en
dc.subject.other	Linear-run	en
dc.subject.other	Magnetic confinement	en
dc.subject.other	Magnetic effects	en
dc.subject.other	MHD equilibrium	en
dc.subject.other	Microinstabilities	en
dc.subject.other	Moving systems	en
dc.subject.other	Nonlinear kinetics	en
dc.subject.other	Operating systems	en
dc.subject.other	Plasma rotations	en
dc.subject.other	Programming language	en
dc.subject.other	Running time	en
dc.subject.other	Solution methods	en
dc.subject.other	State of the art	en
dc.subject.other	Test data	en
dc.subject.other	Tokamak	en
dc.subject.other	Tokamak geometry	en
dc.subject.other	Vlasov equation	en
dc.subject.other	Computational geometry	en
dc.subject.other	Computer operating systems	en
dc.subject.other	Fusion reactors	en
dc.subject.other	Gyroscopes	en
dc.subject.other	Integral equations	en
dc.subject.other	Kinetic theory	en
dc.subject.other	Magnetohydrodynamics	en
dc.subject.other	Numerical methods	en
dc.subject.other	Plasma confinement	en
dc.subject.other	Plasma diagnostics	en
dc.subject.other	Plasma stability	en
dc.subject.other	Plasma theory	en
dc.subject.other	Plasma turbulence	en
dc.subject.other	Plasma waves	en
dc.subject.other	Problem oriented languages	en
dc.subject.other	Program compilers	en
dc.subject.other	Test facilities	en
dc.subject.other	Tubes (components)	en
dc.subject.other	FORTRAN (programming language)	en
dc.title	The nonlinear gyro-kinetic flux tube code GKW	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.cpc.2009.07.001	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.cpc.2009.07.001	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	A new nonlinear gyro-kinetic flux tube code (GKW) for the simulation of micro instabilities and turbulence in magnetic confinement plasmas is presented in this paper. The code incorporates all physics effects that can be expected from a state of the art gyro-kinetic simulation code in the local limit: kinetic electrons, electromagnetic effects. collisions. full general geometry with a coupling to a MHD equilibrium code, and E x B shearing. In addition the physics of plasma rotation has been implemented through a formulation of the gyro-kinetic equation in the co-moving system. The gyro-kinetic model is fivedimensional and requires a massive parallel approach. GKW has been parallelised using MPI and scales well up to 8192+ cores. The paper presents the set of equations solved, the numerical methods, the code structure, and the essential benchmarks. Program summary Program title: GKW Catalogue identifier: AEES_vI_0 Program summary URL: http://cpc.cs.qLib.ac.uk/summaries/AEES-vl-O.html Program obtainablefrom: CK Program Library, Queen's University, Belfast, N. Ireland Licensing provisions: GNU GPL v3 No. of lines in distributed program, including test data, etc.: 29998 No. of bytes in distributed program, including test data, etc.: 206943 Distribution format. tar.gz Programming language: Fortran 95 Computer: Not computer specific Operating system: Any for which a Fortran 95 compiler is available Has the code been vectorised or parallelised?: Yes. The program can efficiently utilise 8192+ processors, depending on problem and available computer. 128 processors is reasonable for a typical nonlinear kinetic run on the latest x86-64 machines. RAM: similar to 128 MB-1 GB for a linear run; 25 GB for typical nonlinear kinetic run (30 million grid points) Classification: 19.8, 19.9, 19.11 External routines: None required, although the functionality of the program is somewhat limited without a MPI implementation (preferably MPI-2) and the FFTW3 library. Nature of problem: Five-dimensional gyro-kinetic Vlasov equation in general flux tube tokamak geometry with kinetic electrons, electro-magnetic effects and collisions Solution method: Pseudo-spectral and finite difference with explicit time integration Additional comments: The MHD equilibrium code CHEASE [1] is used for the general geometry calculations. This code has been developed in CRPP Lausanne and is not distributed together with GKW, but can be downloaded separately. The geometry module of GKW is based on the version 7.1 of CHEASE, which includes the output for Hamada coordinates. Runningtime: (On recent x86-64 hardware) -10 minutes for a short linear problem; 48 hours for typical nonlinear kinetic run. Reference: [1] H. Lutjens, A. Bondeson, O. Sauter, Comput. Phys. Comm. 97 (1996) 219, http://cpc.cs.qub.ac.uk/ surnrnaries/ADDH_v1_0.html Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Computer Physics Communications	en
dc.identifier.doi	10.1016/j.cpc.2009.07.001	en
dc.identifier.isi	ISI:000273011500021	en
dc.identifier.volume	180	en
dc.identifier.issue	12	en
dc.identifier.spage	2650	en
dc.identifier.epage	2672	en