We numerically study the multi-scale properties of a 2d active gel to address the energy transfer mechanism. We find that activity is able to excite long-ranged distortions of the nematic pattern giving rise to spontaneous laminar flows and to a chaotic regime by further increasing the rate of active energy injection. By means of a scale-to-scale spectral analysis we find that the gel is basically driven by the local balancing between active injection and viscous dissipation, without any signal of non-linear hydrodynamical transfer and turbulent cascades. Furthermore, elasticity may qualitatively play an important role by transferring energy from small to larger scales through nemato-hydrodynamic interactions.

我们研究数值为2的多尺度特性d活性凝胶，以解决能量转移机制。我们发现，通过进一步增加有功能量的注入速度，活性能够激发向列型的远距离畸变，从而引起自发的层流和混沌状态。通过按比例缩放光谱分析，我们发现凝胶基本上是由主动注入和粘性耗散之间的局部平衡驱动的，没有任何非线性流体动力传递和湍流级联的信号。此外，弹性可能通过质子-水动力相互作用将能量从小规模转移到更大规模，从而在质量上起重要作用。