Rough Wall Modification of Two-Layer k−ε

P. A. Durbin, G. Medic, J.-M. Seo, J. K. Eaton, S. Song

doi:10.1115/1.1343086

Rough Wall Modification of Two-Layer k−ε

P. A. Durbin

Mechanical Engineering Department, Stanford University, Stanford, CA 94305-3030
G. Medic

Mechanical Engineering Department, Stanford University, Stanford, CA 94305-3030
J.-M. Seo

Mechanical Engineering Department, Stanford University, Stanford, CA 94305-3030
J. K. Eaton

Mechanical Engineering Department, Stanford University, Stanford, CA 94305-3030
S. Song

Mechanical Engineering Department, Stanford University, Stanford, CA 94305-3030

説明

<jats:p>A formulation is developed to apply the two-layer k−ε model to rough surfaces. The approach involves modifying the lν formula and the boundary condition on k. A hydrodynamic roughness length is introduced and related to the geometrical roughness through a calibration procedure. An experiment has been conducted to test the model. It provides data on flow over a ramp with and without surface roughness.</jats:p>