We obtain the decay estimate of the global solution for the 3D incompressible
Oldroyd-B model with only dissipation. The decay rate is optimal in the sense that
this rate coincides with that of the linear system, which improves upon work by Zhu
(J. Funct. Anal. 274:7 (2018) 2039–2060.)
Keywords
Oldroyd-B model, global small solution, integral
representation