Blowup and dissipation in a critical-case unstable thin film equation

We study the dynamics of dissipation and blow-up in a critical-case unstable thin film equation. The governing equation is a nonlinear fourth-order degenerate parabolic PDE derived from a generalized model for lubrication flows of thin viscous fluid layers on solid surfaces. There is a critical mass for blow-up and a rich set of dynamics including families of similarity solutions for finitetime blow-up and infinite-time spreading. The structure and stability of the steady-states and the compactly-supported similarity solutions is studied.