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arXiv 1606.06176math.AP
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三维Navier-斯托克斯方程中的涡重联

Vortex reconnection in the three dimensional Navier-Stokes equations

Alberto Enciso, Renato Luca, Daniel Peralta-Salas

摘要:

我们证明了三维Navier-斯托克斯方程解的涡结构可以改变其拓扑结构而不损失任何正则性。更准确地说,我们构造光滑的高频解的Navier-斯托克斯方程的涡线和涡管的任意复杂的拓扑结构的创建和销毁在任意小的时间。这种涡旋重联的情况在结构上是稳定的,并且与现有的计算机模拟和实验完全一致。我们还提供了一个(非结构稳定)的情况下,涡结构的破坏是瞬时的。

英文摘要:

We prove that the vortex structures of solutions to the 3D Navier-Stokes equations can change their topology without any loss of regularity. More precisely, we construct smooth high-frequency solutions to the Navier-Stokes equations where vortex lines and vortex tubes of arbitrarily complicated topologies are created and destroyed in arbitrarily small times. This instance of vortex reconnection is structurally stable and in perfect agreement with the existing computer simulations and experiments. We also provide a (non-structurally stable) scenario where the destruction of vortex structures is instantaneous.

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