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arXiv 1401.7617math.AP
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具有奇异性的不可压缩二维教学模型和二维Boussinesq方程的显式解

An incompressible 2D didactic model with singularity and explicit solutions of the 2D Boussinesq equations

Dongho Chae, Peter Constantin, Jiahong Wu

摘要:

本文给出了一个与地面准地转方程具有相同尺度的适定的、有限能量的二维不可压缩活动标量方程的例子,证明了它能产生有限时间奇异性。尽管它很简单,但这似乎是第一个这样的例子。此外,我们构造显式解的二维Boussinesq方程的梯度指数增长的时间为所有的时间。此外,我们介绍了一个变种的二维Boussinesq方程,这也许是一个更忠实的同伴的三维轴对称欧拉方程比通常的二维Boussinesq方程。

英文摘要:

We give an example of a well posed, finite energy, 2D incompressible active scalar equation with the same scaling as the surface quasi-geostrophic equation and prove that it can produce finite time singularities. In spite of its simplicity, this seems to be the first such example. Further, we construct explicit solutions of the 2D Boussinesq equations whose gradients grow exponentially in time for all time. In addition, we introduce a variant of the 2D Boussinesq equations which is perhaps a more faithful companion of the 3D axisymmetric Euler equations than the usual 2D Boussinesq equations.

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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