Calcu7lation of incompressible viscous flows by an unconditionally stable projection FEM

摘要

This paper investigates the numerical performance of a finite element implementation of a new incremental fractional-step method to compute steady and unsteady incompressible viscous flows under general boundary conditions and using unstructured meshes. A variational framework is adopted which accommodates two different spaces for representing and approximating the veloc- ity fields calculated respectively in the viscous and inviscid phases of the method, but which leads to a very simple numerical scheme in terms of only one discrete velocity field.