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arXiv 1610.07597math.APmath-phmath.MP
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大尺度湿大气三维粘性原始方程解的整体吸引子的有限维性

Finite dimensionality of global attractor for the solutions to 3D viscous primitive equations of large-scale moist atmosphere

Guoli Zhou

摘要:

在一般边界条件下,研究了三维带粘性的湿原始方程的强解的整体吸引子的Hausdorff维数和分形维数的有限性.首先,我们得到了$L^2(\mho)$方程强解的一阶时间导数的时间一致估计。然后,为了证明整体吸引子的Hausdorff维数和分形维数的有限性,常用的方法是得到$H^2(\mho)$中强解的一致有界性,从而建立解算子的压缩性质.但由于边界条件的限制和三维湿原始方程组的复杂结构,使其难以实现。为了克服这些困难,我们尝试利用$L^2(\mho)$中强解对时间$t$的导数的一致有界性来证明整体吸引子的一致连续性.最后,利用整体吸引子的一致连续性,我们建立了解算子的压缩性质,这意味着整体吸引子的Hausdorff维数和分形维数是有限的.

英文摘要:

Under general boundary conditions we consider the finiteness of the Hausdorff and fractal dimensions of the global attractor for the strong solution of the 3D moist primitive equations with viscosity. Firstly, we obtain time-uniform estimates of the first-order time derivative of the strong solutions in $L^2(\mho)$. Then, to prove the finiteness of the Hausdorff and fractal dimensions of the global attractor, the common method is to obtain the uniform boundedness of the strong solution in $H^2(\mho)$ to establish the squeezing property of the solution operator. But it is difficult to achieve due to the boundary conditions and complicated structure of the 3D moist primitive equations. To overcome the difficulties, we try to use the uniform boundedness of the derivative of the strong solutions with respect to time $t$ in $L^2(\mho)$ to prove the uniform continuity of the global attractor. Finally, using the uniform continuity of the global attractor we establish the squeezing property of the solution operator which implies the finiteness of the Hausdorff and fractal dimensions of the global attractor.

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