CENTORI: A global toroidal electromagnetic twofluid plasma turbulence code
(2012) In Computer Physics Communications 183(11). p.23462363 Abstract
 A new global twofluid electromagnetic turbulence code, CENTORI, has been developed for the purpose of studying magneticallyconfined fusion plasmas on energy confinement timescales. This code is used to evolve the combined system of electron and ion fluid equations and Maxwell equations in toroidal configurations with axisymmetric equilibria. Uniquely, the equilibrium is coevolved with the turbulence, and is thus modified by it. CENTORI is applicable to tokamaks of arbitrary aspect ratio and high plasma beta. A predictor–corrector, semiimplicit finite difference scheme is used to compute the time evolution of fluid quantities and fields. Vector operations and the evaluation of flux surface averages are speeded up by choosing the... (More)
 A new global twofluid electromagnetic turbulence code, CENTORI, has been developed for the purpose of studying magneticallyconfined fusion plasmas on energy confinement timescales. This code is used to evolve the combined system of electron and ion fluid equations and Maxwell equations in toroidal configurations with axisymmetric equilibria. Uniquely, the equilibrium is coevolved with the turbulence, and is thus modified by it. CENTORI is applicable to tokamaks of arbitrary aspect ratio and high plasma beta. A predictor–corrector, semiimplicit finite difference scheme is used to compute the time evolution of fluid quantities and fields. Vector operations and the evaluation of flux surface averages are speeded up by choosing the Jacobian of the transformation from laboratory to plasma coordinates to be a function of the equilibrium poloidal magnetic flux. A subroutine, GRASS, is used to coevolve the plasma equilibrium by computing the steadystate solutions of a diffusion equation with a pseudotime derivative. The code is written in Fortran 95 and is efficiently parallelised using Message Passing Interface (MPI). Illustrative examples of output from simulations of a tearing mode in a large aspect ratio tokamak plasma and of turbulence in an elongated conventional aspect ratio tokamak plasma are provided. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/record/3195298
 author
 Knight, P.J.; Thyagaraja, A.; Edwards, T.D.; Hein, Joachim ^{LU} ; Romanelli, M. and McClements, K.G.
 organization
 publishing date
 2012
 type
 Contribution to journal
 publication status
 published
 subject
 keywords
 Twofluid and multifluid plasmas, Drift waves, Tokamaks, Spherical tokamaks, Plasma turbulence, Magnetohydrodynamic and fluid equations
 in
 Computer Physics Communications
 volume
 183
 issue
 11
 pages
 2346  2363
 publisher
 Elsevier
 external identifiers

 wos:000308122000004
 scopus:84864444421
 ISSN
 00104655
 DOI
 10.1016/j.cpc.2012.06.002
 language
 English
 LU publication?
 yes
 id
 bb54ecdd8cd245869b96eb338b0c3aff (old id 3195298)
 date added to LUP
 20130129 18:03:40
 date last changed
 20180107 04:31:49
@article{bb54ecdd8cd245869b96eb338b0c3aff, abstract = {A new global twofluid electromagnetic turbulence code, CENTORI, has been developed for the purpose of studying magneticallyconfined fusion plasmas on energy confinement timescales. This code is used to evolve the combined system of electron and ion fluid equations and Maxwell equations in toroidal configurations with axisymmetric equilibria. Uniquely, the equilibrium is coevolved with the turbulence, and is thus modified by it. CENTORI is applicable to tokamaks of arbitrary aspect ratio and high plasma beta. A predictor–corrector, semiimplicit finite difference scheme is used to compute the time evolution of fluid quantities and fields. Vector operations and the evaluation of flux surface averages are speeded up by choosing the Jacobian of the transformation from laboratory to plasma coordinates to be a function of the equilibrium poloidal magnetic flux. A subroutine, GRASS, is used to coevolve the plasma equilibrium by computing the steadystate solutions of a diffusion equation with a pseudotime derivative. The code is written in Fortran 95 and is efficiently parallelised using Message Passing Interface (MPI). Illustrative examples of output from simulations of a tearing mode in a large aspect ratio tokamak plasma and of turbulence in an elongated conventional aspect ratio tokamak plasma are provided.}, author = {Knight, P.J. and Thyagaraja, A. and Edwards, T.D. and Hein, Joachim and Romanelli, M. and McClements, K.G.}, issn = {00104655}, keyword = {Twofluid and multifluid plasmas,Drift waves,Tokamaks,Spherical tokamaks,Plasma turbulence,Magnetohydrodynamic and fluid equations}, language = {eng}, number = {11}, pages = {23462363}, publisher = {Elsevier}, series = {Computer Physics Communications}, title = {CENTORI: A global toroidal electromagnetic twofluid plasma turbulence code}, url = {http://dx.doi.org/10.1016/j.cpc.2012.06.002}, volume = {183}, year = {2012}, }