Numerical Modeling on Heat Transport Across Stochastic Magnetic Field |
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| Authors: | Q Wang X Zha H Lu X Wang B Wu S Zhu |
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| Institution: | 1. Applied Physics Department, School of Science, Donghua University, Shanghai 201620, China;2. Member of Magmetic Confinement Fusion Research Center, Ministry of Education, People's Republic of China;3. Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;4. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China |
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| Abstract: | The heat diffusion across the stochastic magnetic field is studied numerically. The stochastic field is generated by the overlap of two magnetic islands. The parameter w/wc, is found tobe an important parameter in charactering the transport, where w is the magnetic island width, and wc is the critical island width for flattening the electron temperature across an island. For w/wc < 1, the enhanced radial heat diffusivity χr is proportional to the parallel heat diffusivity χ∥, and the heat transport is dominated by the additive effect of individual islands. For w/wc > 3, χr is also proportional to χ∥ and the additional degradation of the energy confinement due to stochastic magnetic field becomes apparent. (© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
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| Keywords: | Heat transport magnetic island stochastic magnetic field |
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