Biography
Biography: Nariman Ashrafi
Abstract
The squeeze flow of a nonlinear viscoelastic flow is studied. In particular, the flow of an upper-convected Maxwell fluid between two approaching disks is analyzed. The momentum and continuity equations together with constitutive relations are solved by a low-order method. Both no slip and slip boundary conditions are considered. Next, stress components are evaluated and flow stability is investigated. It is observed that, as the disks approach, velocity increased the developed stresses, which are interrelated to velocity gradients through the constitutive relation, and are altered exponentially. This analysis is applicable to many industrial instances such as lubrication as well as natural joints.