Modeling of turbulent fluid flow over a rough wall with or with outsuction

G. Grégoire (1) , Michel Favre-Marinet (1) , François Julien Saint Amand (2)

1 LEGI - Laboratoire des Écoulements Géophysiques et Industriels [Grenoble]
2 LGP2 - Laboratoire Génie des procédés papetiers

The turbulent flow close to a wall with two-dimensional roughness is computed with a two-layer zonal model. For an impermeable wall, the classical logarithmic law compares well with the numerical results if the location of the fictitious wall modeling the surface is considered at the top of the rough boundary. The model developed by Wilcox for smooth walls is modified to account for the surface roughness and gives satisfactory results, especially for the friction coefficient, for the case of boundary layer suction.

Mots clés: boundary layer turbulence; rough surfaces; surface topography; friction; flow simulation; computational fluid dynamics; interface phenomena

Domaines: Mécanique des fluides [physics.class-ph]; Mécanique des fluides [physics.class-ph]

G. Grégoire, Michel Favre-Marinet, François Julien Saint Amand. Modeling of turbulent fluid flow over a rough wall with or with outsuction. Journal of Fluids Engineering, 2003, 125 (4), pp.636-642. ⟨10.1115/1.1593705⟩. ⟨hal-00204630⟩