Development of a first-principal simulation code of L-H transition

2015 Fiscal Year Final Research Report

• Project/Area Number: 26889068
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Nuclear fusion studies
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: SETO HARUKI 国立研究開発法人日本原子力研究開発機構, 核融合研究開発部門 六ヶ所核融合研究所, 博士研究員 (90733692)
• Project Period (FY): 2014-08-29 – 2016-03-31
• Keywords: L-H遷移 / 簡約化MHDモデル / シミュレーション

Outline of Final Research Achievements

Development of a first-principal simulation code of L-H transition was carried out based on a three-dimensional MHD/turbulent simulation framework BOUT++ for the quantitative prediction of L-H transition through the improvement of turbulent transport model in L-H transition and H-mode discharge. Although L-H transition itself was not reproduce due to a numerical instability expected to arise from an inconsistent treatment of n=0 mode, a set of key mechanisms required for L-H transition, (1) the generation of the edge radial electric field shear, (2) the reduction of the edge turbulence level, (3) the enhancement of the energy deposition at the edge region, was observed.

Free Research Field

核融合学