... 2014 25 07 2014 Various corrections were previously proposed to account for wall roughness with the k–ω and shear stress transport (SST) models. A simplified analysis, based upon the wall region analysis, is proposed to characterize the behavior of these roughness corrections...

...G. F. K. Tay; D. C. S. Kuhn; M. F. Tachie This paper reports an experimental investigation of the effects of wall roughness and favorable pressure gradient on low Reynolds number turbulent flow in a two-dimensional asymmetric converging channel. Flow convergence was produced by means of ramps...

... in Figs. 4a also supports the universal linear relation very well for all kinds of roughnesses. 25 06 2006 16 05 2007 friction pipe flow surface roughness turbulence friction factor turbulent flow wall roughness universal relations pressure drop natural...

...B. Aupoix A general procedure to extend turbulence models to account for wall roughness, in the framework of the equivalent sand grain approach, is proposed. It is based on the prescription of the turbulent quantities at the wall to reproduce the shift of the logarithmic profile and hence provide...