Generalized Anistropic/Isotropic Porous Media in LS-DYNA

In recent years industries like aerospace, automotive and those related to oil production have increased their trustfulness on numerical models and codes for the design, research, production and verification of highly critical parts and production processes. Most of these industries have adopted manufacturing procedures involving composites materials in liquid state, like the Liquid Composite Molding (LCM) and the High Pressure Resin Transfer Molding (HPRTM) methods, where a Newtonian (or Non- Newtonian) fluid flows through highly anistropic matrices filling an initially empty container. In this article the numerical modeling of the flow through general anistropic porous media using LS-DYNA is introduced. A generalization of the Navier-Stokes equations that will allow the definition of sub-domains with different permeability/porosity was developed. The SUPGjOSS stabilizing Finite Element Method for the spatial approximation and the second-order Fractional Step Method for the time integration were adopted. Also, the paper will provide some examples showing the use of LS-DYNA user interfase for this kind of flow problems.