The nature of the turbulent energy transfer rate is studied using direct numerical simulations of weakly collisional space plasmas. This is done comparing results obtained from hybrid Vlasov–Maxwell simulations of collisionless plasmas, Hall magnetohydrodynamics and Landau fluid models reproducing low-frequency kinetic effects, such as the Landau damping. In this turbulent scenario, estimates of the local and global scaling properties of different energy channels are obtained using a proxy of the local energy transfer. This approach provides information on the structure of energy fluxes, under the assumption that the turbulent cascade transfers most of the energy that is then dissipated at small scales by various kinetic processes in these kinds of plasmas.

中文翻译：

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等离子体湍流模型中能量转移的局部和全局特性

使用弱碰撞空间等离子体的直接数值模拟来研究湍流能量转移率的性质。这是通过比较从无碰撞等离子体的混合 Vlasov-Maxwell 模拟、霍尔磁流体动力学和再现低频动力学效应（如朗道阻尼）的朗道流体模型获得的结果来完成的。在这种动荡的情况下，使用局部能量转移的代理来获得不同能量通道的局部和全局缩放特性的估计。这种方法提供了关于能量通量结构的信息，假设湍流级联转移了大部分能量，然后通过这些等离子体中的各种动力学过程在小尺度上消散。