Computer Aided Mixing Modeling Using the Galerkin Least-Squares Finite Element Technique.

• Main Authors: Kevin J. Bittorf, Keith Johnson
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Orca
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.573.3755; http://www.acusim.com/papers/mixing_with_gls.pdf

A novel approach for computer aided modeling and optimizing mixing process has been developed using Galerkin least-squares finite element technology. Computer aided mixing modeling and analysis involves Lagrangian and Eulerian analysis for relative fluid stretching and energy dissipation concepts for laminar and turbulent flows. High quality, conservative, accurate, fluid velocity and continuity solutions are required for determining mixing quality. The ORCA Computational Fluid Dynamics (CFD) package, based on a finite element formulation, solves the incompressible Reynolds Averaged Navier Stokes (RANS) equations. Though finite element technology has been well used in areas of heat transfer, solid mechanics, and aerodynamics for years, it has only recently been applied to the area of fluid mixing. Most commercial technologies solve the resultant Partial Differential Equations (PDE’s) as discretized approximate solutions using finite volume or finite difference formulations. ORCA has been developed using the Galerkin Least-Squares (GLS) finite element technology. The GLS finite element technique presented provides another formulation for numerically solving the RANS based and LES based fluid mechanics equations.