TY - JOUR
T1 - SOL-divertor plasma simulations introducing anisotropic temperature with virtual divertor model
AU - Togo, S.
AU - Takizuka, T.
AU - Nakamura, M.
AU - Hoshino, K.
AU - Ogawa, Y.
N1 - Funding Information:
We would like to thank Dr. K. Shimizu of Japan Atomic Energy Agency for his helpful advice on the numerical calculations. We are also grateful for Dr. K. Ibano of the University of Tokyo for the fruitful discussion in writing this manuscript. This work is partly supported by a Grant-in-Aid for Scientific Research from Japan Society for the Promotion of Science (JSPS).
Publisher Copyright:
© 2014 Elsevier B.V.
PY - 2015/7/22
Y1 - 2015/7/22
N2 - Abstract A 1D SOL-divertor plasma simulation code by introducing the anisotropic ion temperature with virtual divertor model has been developed. By introducing the anisotropic ion temperature directly, the second-order derivative parallel ion viscosity term in the momentum transport equation can be excluded and the boundary condition at the divertor plate will not be required in the simulation. In order to express the effects of the divertor plate and accompanying sheath implicitly, a virtual divertor model which has artificial sinks for the particle, momentum and energy has been introduced. Periodic boundary condition becomes available by the use of the virtual divertor model. By using this model, SOL-divertor plasmas which satisfy the Bohm condition has been successfully obtained. The dependence of the ion temperature anisotropy on the normalized mean free path of ion and the validity of the parallel ion viscous flux for the Braginskii expression and the limited one are also investigated.
AB - Abstract A 1D SOL-divertor plasma simulation code by introducing the anisotropic ion temperature with virtual divertor model has been developed. By introducing the anisotropic ion temperature directly, the second-order derivative parallel ion viscosity term in the momentum transport equation can be excluded and the boundary condition at the divertor plate will not be required in the simulation. In order to express the effects of the divertor plate and accompanying sheath implicitly, a virtual divertor model which has artificial sinks for the particle, momentum and energy has been introduced. Periodic boundary condition becomes available by the use of the virtual divertor model. By using this model, SOL-divertor plasmas which satisfy the Bohm condition has been successfully obtained. The dependence of the ion temperature anisotropy on the normalized mean free path of ion and the validity of the parallel ion viscous flux for the Braginskii expression and the limited one are also investigated.
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U2 - 10.1016/j.jnucmat.2014.09.081
DO - 10.1016/j.jnucmat.2014.09.081
M3 - Article
AN - SCOPUS:84937728819
VL - 463
SP - 502
EP - 505
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
M1 - 48494
ER -