Global regularity for the 2D Oldroyd-B model in the corotational case

Abstract

This paper is dedicated to the Oldroyd-B model with fractional dissipation $(-\Delta {)}^{\alpha }\tau$ for any $\alpha >0$. We establish the global smooth solutions to the Oldroyd-B model in the corotational case with arbitrarily small fractional powers of the Laplacian in two spatial dimensions. The methods described here are quite different from the tedious iterative approach used in recent paper \cite{XY}. Moreover, in the Appendix we provide some a priori estimates to the Oldroyd-B model in the critical case which may be useful and of interest for future improvement. Finally, the global regularity to to the Oldroyd-B model in the corotational case with $-\Delta u$ replaced by $(-\Delta {)}^{\gamma }u$ for $\gamma >1$ are also collected in the Appendix. Therefore our result is more closer to the resolution of the well-known global regularity issue on the critical 2D Oldroyd-B model.

23 pages, Submitted August 2014

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Cited by in corpus (3)

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• High Reynolds number and high Weissenberg number Oldroyd-B model with dissipation
• Global existence and long time behavior of solutions to some Oldroyd type models in hybrid Besov spaces