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Verification of BOUT++ by the method of manufactured solutions

Benjamin Dudson ; Jens Madsen ; John Omotani (Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers)) ; Peter Hill ; Luke Easy ; Michael Løiten
Physics of Plasmas (1070-664X). Vol. 23 (2016), 6,
[Artikel, refereegranskad vetenskaplig]

BOUT++ is a software package designed for solving plasma fluid models. It has been used to simulate a wide range of plasma phenomena ranging from linear stability analysis to 3D plasma turbulence and is capable of simulating a wide range of drift-reduced plasma fluid and gyro-fluid models. A verification exercise has been performed as part of a EUROfusion Enabling Research project, to rigorously test the correctness of the algorithms implemented in BOUT++, by testing order-of-accuracy convergence rates using the Method of Manufactured Solutions (MMS). We present tests of individual components including time-integration and advection schemes, non-orthogonal toroidal field-aligned coordinate systems and the shifted metric procedure which is used to handle highly sheared grids. The flux coordinate independent approach to differencing along magnetic field-lines has been implemented in BOUT++ and is here verified using the MMS in a sheared slab configuration. Finally, we show tests of three complete models: 2-field Hasegawa-Wakatani in 2D slab, 3-field reduced magnetohydrodynamics (MHD) in 3D field-aligned toroidal coordinates, and 5-field reduced MHD in slab geometry.

Article Number: 062303

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Denna post skapades 2016-06-09. Senast ändrad 2016-08-18.
CPL Pubid: 237537


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