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Resistive coupling in drift wave turbulence

Thomas Sunn Pedersen, Poul K Michelsen, Jens Juul Rasmussen1996年Plasma Physics and Controlled FusionIF 2.2出版社

The Hasegawa - Wakatani (HW) model equations for resistive drift waves are investigated numerically and analytically. Two fundamentally different assumptions about the parallel electron dynamics have been investigated previously, and these are compared analytically and numerically. Analytically, it is found that the large-scale behaviour is different in the two cases. Numerically, it is found that the resulting quasi-two-dimensional turbulence is very sensitive to the assumption made, indicating that three-dimensional simulations are necessary for realistic simulation of the physical processes modelled by the HW system. In addition, a new numerical scheme for the time integration has enabled long-time simulations in the adiabatic regime showing that the total energy and the total generalized enstrophy do not vanish in this limit.

日本語訳

Hasegawa-Wakatani(HW)モデル方程式による抵抗性ドリフト波を、数値的および解析的に調査した。平行電子ダイナミクスに関する2つの根本的に異なる仮定がこれまでに調査されており、これらを解析的および数値的に比較した。解析的には、大規模な挙動が2つの場合で異なることが見出された。数値的には、結果として生じる準二次元乱流が仮定に非常に敏感であり、HWシステムによってモデル化される物理過程の現実的なシミュレーションには三次元シミュレーションが必要であることが示された。さらに、時間積分のための新しい数値スキームにより、断熱領域での長時間シミュレーションが可能となり、この極限において全エネルギーと全一般化エンストロフィーが消滅しないことが示された。

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Drift wavesDrift wave turbulence
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