Global well-posedness of coupled parabolic systems

• Published in: Science China. Mathematics Vol. 63; no. 2; pp. 321 - 356
• Main Authors: Xu, Runzhang, Lian, Wei, Niu, Yi
• Format: Journal Article
• Language: English
• Published: Beijing Science China Press 01.02.2020; Springer Nature B.V
• Subjects: Applications of Mathematics; Boundary value problems; Decay; Energy; Initial conditions; Mathematical problems; Mathematics; Mathematics and Statistics; Nonlinear systems; Well posed problems; coupled parabolic systems; global existence; 35K51; 35K40; asymptotic behavior; reaction-diffusion systems; finite time blowup
• ISSN: 1674-7283; 1869-1862
• DOI: 10.1007/s11425-017-9280-x

The initial boundary value problem of a class of reaction-diffusion systems (coupled parabolic systems) with nonlinear coupled source terms is considered in order to classify the initial data for the global existence, finite time blowup and long time decay of the solution. The whole study is conducted by considering three cases according to initial energy: the low initial energy case, critical initial energy case and high initial energy case. For the low initial energy case and critical initial energy case the suffcient initial conditions of global existence, long time decay and finite time blowup are given to show a sharp-like condition. In addition, for the high initial energy case the possibility of both global existence and finite time blowup is proved first, and then some suffcient initial conditions of finite time blowup and global existence are obtained, respectively.