FLOW code web page
Introduction
The code FLOW was
developed as a collaboration between the University of Rochester and the
Princeton Plasma Physics Laboratory. The purpose of the code is to study the
equilibrium properties of toroidal devices, such as tokamaks, in conditions
relevant to present day experiments.
The most unique feature of
the code is the ability to study flow-dependent equilibria. Present day
experiments often show the presence of high macroscopic flow. Large toroidal flows, of the
order of a significant fraction of the sound spped, are
routinely measured in tokamak plasmas (e.g., DIII-D, Alcator C-Mod), even in the absence of an external source of momentum.
Measured toroidal rotation is particularly large in low-aspect ratio machines
(NSTX, MAST).
Poloidal rotation in experiments is somewhat lower and mostly observed near the plasma edge.
Edge rotation can be of the order of the poloidal sound speed (~10s km/s): even such a small rotation
can create large qualitative modifications in the equilibrium profiles.
[R.
Betti, J. P. Freidberg, PoP 7, 2439 (2000)]
Despite
the obvious relevance of the study of equilibrium in the presence of strong flow,
little work has been done on the subject, in particular regarding poloidal
rotation, which constitutes a more difficult problem with respect to purely
toroidal rotation. To the best of the authors' knowledge, before the code
development no numerical work at all had been done on equilibria with poloidal
flow exceeding the poloidal sound speed.
The code main targets are: 1) The study of MHD and kinetic tokamak equilibria
with purely toroidal flow 2) The study of MHD equilibria in the presence of
arbitrary poloidal flow Contact: Luca Guazzotto, Auburn University
last modified January 28 2016
For a more detailed
description of the code, see [L. Guazzotto,
R. Betti, J. Manickam and S. Kaye, PoP 11, 604 (2004)]
References and support material:
L. Guazzotto,
R. Betti, J. Manickam and S. Kaye, Phys. Plasmas 11, 604 (2004)
L. Guazzotto and R. Betti, Phys. Plasmas 12, 056107 (2005)
L. Guazzotto, J. P. Freidberg and J. Kesner, Phys. Plasmas 14, 062501 (2007)
L. Guazzotto and R. Paccagnella, Plasma Phys. Controlled Fusion 51, 065013 (2009)
L. Guazzotto, R. Betti and
S. C. Jardin, Phys. Plasmas 20, 042502 (2013)
L. Guazzotto and E. Hameiri Phys. Plasmas 21, 022512 (2014)
Copyright notes:
1) For the Physics of Plasmas papers:
Copyright
American Institute of Physics. These articles may be downloaded for
personal use only. Any other use requires prior permission of the
author and the American Institute of Physics.
2) For the Plasma Physics and Controlled Fusion paper:
This
is an author-created, un-copyedited version of an article accepted for
publication in Plasma Physics and Controlled Fusion. IOP Publishing Ltd
is not responsible for any errors or omissions in this version of the
manuscript or any version derived from it. The definitive publisher
authenticated version is available online at (IOP website)