표면 거칠기 효과를 고려한 2-방정식 난류 모델의 성능평가

Abstract

The effect of roughness is a change in the velocity and turbulence distributions near the surface. Turbulence models with surface roughness effect are applied to the fully developed flow in a two-dimensional, rough wall channel. Modified wall function model, low-Reynolds number k-8 model, and k-0) model are selected for comparison. In order to make a fair comparison, the calculation results are compared with the experimental data. The modified wall function model and the low-Reynolds number k-e model require further refinement, while the k-0) model of Wilcox performs remarkably well over a wide range of roughness values.