turbulent flow in a composite channel

numerical solutions for turbulent flow in a composite channel are presented. here, a channel with a centered porous material is considered. the interface between the porous medium and the clear flow was assumed to have different transversal positions and the porous matrix was simulated with distinct permeabilities. governing equations were discretized and solved for both domains making use of one unique numerical methodology. increasing the size of the porous material pushes the flow outwards, increasing the levels of turbulent kinetic energy at the macroscopic interface. for high permeability media, a large amount of mechanical energy is converted into turbulence inside the porous structure.