arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1101.2209math.APphysics.flu-dyn
收藏

物理尺度下Navier-斯托克斯方程的二维湍流

2D turbulence in physical scales of the Navier-Stokes equations

R. Dascaliuc, Z. Grujic

摘要:

本文利用二维Navier-斯托克斯方程的局部分析,得到了涉及Taylor和Kraichnan长度尺度以及区域大小的能量通量和涡度拟能通量的估计。在驱动力为零和整体能量不增的框架下,这些边界为正向涡拟能和逆能量级联的存在提供了充分条件。在这些条件下的通量的局部性的几种表现形式得到。所有涉及到的尺度都是R^2中的实际物理尺度,没有做任何同质性假设。

英文摘要:

Local analysis of the two dimensional Navier-Stokes equations is used to obtain estimates on the energy and enstrophy fluxes involving Taylor and Kraichnan length scales and the size of the domain. In the framework of zero driving force and non-increasing global energy, these bounds produce sufficient conditions for existence of the direct enstrophy and inverse energy cascades. Several manifestations of locality of the fluxes under these conditions are obtained. All the scales involved are actual physical scales in R^2 and no homogeneity assumptions are made.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑