This paper is dedicated to the Oldroyd-B model with fractional dissipation $(-Δ)^ατ$ for any $α>0$. 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 $-Δu$ replaced by $(-Δ)^γu$ for $γ>1$ 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.
Global well-posedness of strong solutions to the initial-boundary value problem for a two-dimensional stress-diffusive Oldroyd-B model in the creeping flow regime
MOE-LCSM, School of Mathematics and Statistics, Hunan Normal University（湖南师范大学数学与统计学院）
Global well-posedness and uniform-in-time vanishing damping limit for the inviscid Oldroyd-B model
Research Institute of Intelligent Complex Systems, Fudan University（复旦大学智能复杂系统研究所）；School of Science, Shenzhen Campus of Sun Yat-sen University（中山大学深圳校区理学院）；School of Mathematics, Georgia Institute of Technology（佐治亚理工学院数学学院）；School of Mathematical Sciences, Fudan University（复旦大学数学科学学院）
Global existence and optimal decay of solutions to the incompressible Oldroyd-B model with only stress tensor dissipation and without damping mechanism
