Flux tube train model for local turbulence simulation of toroidal plasmas

Journal Article · Sun Feb 15 00:00:00 EST 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4907793· OSTI ID:22408102

Watanabe, T. -H. ^[1]; Sugama, H.; Ishizawa, A.; Nunami, M. ^[2]

---

1. Department of Physics, Nagoya University, Nagoya 464-8602 (Japan)
2. National Institute for Fusion Science, Toki, Gifu 509-5292 (Japan)

A new simulation method for local turbulence in toroidal plasmas is developed by extending the conventional idea of the flux tube model. In the new approach, a train of flux tubes is employed, where flux tube simulation boxes are serially connected at each end along a field line so as to preserve a symmetry of the local gyrokinetic equations for image modes in an axisymmetric torus. Validity of the flux tube train model is confirmed against the toroidal ion temperature gradient turbulence for a case with a long parallel correlation of fluctuations, demonstrating numerical advantages over the conventional method in the time step size and the symmetry-preserving property.

• OSTI ID: 22408102
• Journal Information: Physics of Plasmas, Vol. 22, Issue 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AXIAL SYMMETRY
COHERENT TUBE MODEL
CORRELATIONS
FLUCTUATIONS
ION TEMPERATURE
PLASMA
SIMULATION
TEMPERATURE GRADIENTS
TOROIDAL CONFIGURATION
TURBULENCE