We develop a conservative gyrofluid model that is suitable for global flux-driven simulations of electrostatic tokamak plasma turbulence. On the basis of the general gyrofluid moment equations, we derive energy equations which enable us to manipulate the impact of a gyrofluid closure on energetics. We demonstrate that an artificial manipulation of high order moment contributions to gyrofluid moment equations via a closure model can lead to the violation of the energy conservation. A fluid closure is also found to restrict the maximum attainable order of finite Larmor radius terms, implying the loss of dynamical information by the closure.

中文翻译：

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保守的陀螺流体模型：闭合对能量学的影响

我们开发了一个保守的陀螺流体模型，适用于静电托卡马克等离子体湍流的全局通量驱动模拟。在一般陀螺流体力矩方程的基础上，我们推导出能量方程，使我们能够操纵陀螺流体闭合对能量学的影响。我们证明了通过闭合模型对陀螺流体力矩方程的高阶力矩贡献的人工操纵会导致违反能量守恒。还发现流体闭合限制了有限拉莫尔半径项的最大可达到阶数，这意味着闭合会丢失动态信息。