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arXiv 0807.1563physics.flu-dyn
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分数耗散$d$维不可压流的自发对称性破缺和有限时间奇异性

Spontaneous symmetry breaking and finite time singularities in $d$-dimensional incompressible flow with fractional dissipation

G. M. Viswanathan, T. M. Viswanathan

摘要:

研究了在分数阶Laplacian $|\nabla |^α$下$d\geq 2$维不可压纳维-斯托克斯方程中奇异性的形成.我们推导出一个充分的,但不是必要的条件,解决方案始终保持光滑,并表明有限时间奇点不能形成$α\geq α_c= 1+d/2$。此外,初始奇点变得不稳定的$α>α_c$。

英文摘要:

We investigate the formation of singularities in the incompressible Navier-Stokes equations in $d\geq 2$ dimensions with a fractional Laplacian $|\nabla |^α$. We derive analytically a sufficient but not necessary condition for solutions to remain always smooth and show that finite time singularities cannot form for $α\geq α_c= 1+d/2$. Moreover, initial singularities become unstable for $α>α_c$.

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。

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