论文标题
建模具有快速粘度变化的压缩湍流等离子体
Modeling compressed turbulent plasma with rapid viscosity variations
论文作者
论文摘要
我们提出了两个方程式模型，以捕获经历压缩的湍流等离子体的动力学，并经历较大的粘度变化。 这些模型解释了可能的复发阶段和快速粘度通过闭合而变化，取决于湍流雷诺和粘度弗洛德数字。这些封闭是通过使用涡流式准法线马尔可夫模拟的数据驱动方法确定的。最佳模型能够模仿\ citet {viciconte2018}中确定的各种自相似度，并恢复\ citet {Coleman1991}确定的快速过渡限制。
We propose two-equations models in order to capture the dynamics of a turbulent plasma undergoing compression and experiencing large viscosity variations. The models account for possible relaminarization phases and rapid viscosity changes through closures dependent on the turbulent Reynolds and on the viscosity Froude numbers. These closures are determined from a data-driven approach using eddy-damped quasi normal markovian simulations. The best model is able to mimic the various self-similar regimes identified in \citet{Viciconte2018} and to recover the rapid transition limits identified by \citet{Coleman1991}.
