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arXiv 2104.09440math.AP
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理想MHD的并元模型

Dyadic models for ideal MHD

Mimi Dai, Susan Friedlander

摘要:

本文研究了两种不可压缩理想磁流体力学的并矢模型,一种是单向能量级联模型,另一种是前向和后向能量级联模型。建立了两个模型的整体弱解存在性和局部适定性。此外,与正的初始数据相关联的单向能量级联的模型的解决方案被证明在有限时间发展爆破。此外,一组不动点被发现为每个模型。证明了关于某些特殊不动点的线性不稳定性。

英文摘要:

We study two dyadic models for incompressible ideal magnetohydrodynamics, one with a uni-directional energy cascade and the other one with both forward and backward energy cascades. Global existence of weak solutions and local well-posedness are established for both models. In addition, solutions to the model with uni-directional energy cascade associated with positive initial data are shown to develop blow-up at a finite time. Moreover, a set of fixed points is found for each model. Linear instability about some particular fixed points is proved.

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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