Author(s)

Christian Forkel, Christoph Schweim, Olaf Bergen, Volker Spork & Jurgen Kongeter

Abstract

The paper presents a new approach on mixed Neumann/Dirichlet boundary conditions in a finite element code for two- and three-dimensional flow simulations in irregular domains based on the Projection-2-algorithm [1]. The new approach is based on the following idea: In a first step the momentum equations are solved neglecting all Dirichlet boundary conditions on the mixed boundary nodes. Thereafter the velocities at the mixed boundaries are projected in the specified direction. In a second solution of the momentum equations, these projected velocities are now used as Dirichlet boundary conditions. Final

Keywords