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Theory and simulation of non-local thermal smoothing for arbitrary scale length modulation
http://hdl.handle.net/10655/2698
http://hdl.handle.net/10655/2698c8868ac5-871d-48b3-af09-f8ff8498f40a
Item type | 研究報告書 / Research Paper(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2010-02-05 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Theory and simulation of non-local thermal smoothing for arbitrary scale length modulation | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_18ws | |||||
資源タイプ | research report | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Chen, M.
× Chen, M.× Kishimoto, Y.× Li, J.× Saitou, D. |
|||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We present a theory that describes the non-local heat transport and associated thermal smoothing modeling the non-uniform laser illumination by solving the steady state Fokker-Planck (FP) equation. A method that connects higher order Chapman-Enskog expansion for low energy electrons and convolution formula for high energy ones through the self-consistent determination of the electric field is developed. The theory explicitly expresses the heat flux for arbitrary periodic temperature modulation given by deltaT/T_a=epsilon_T sin(kx) with moderate wave number k lambda_e leq 0.1, where lanbda_e is the electron mean free path. The theory is compared with one-dimensional FP simulations by which we investigate the relaxation of sinusoidal temperature perturbations. Reduction of the heat flux from the Spitzer-H rm (SH) theory and the hysteresis nature are found to be reproduced. As the wavelength of the modulation becomes shorter, the contribution from high energy electrons to the heat flux is found to increase whereas the total amount of the heat flux is reduced in proportion to (k lambda_e) ^2. | |||||
書誌情報 |
en : Research Report NIFS-Series 発行日 2008-10-01 |
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報告書番号 | ||||||
NIFS-936 | ||||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0915-633X |