Effect of wall structured roughness on friction and heat transfer in pipe flow Academic Article uri icon


  • ABSTRACT The present study deals with the effects of wall geometry on fluid flow and heat transfer in a circular tube. Rectangularrib structural wall roughness is considered. This roughness is characterized by rib height, width and pitch. A detailed parametric investigation of the effect of rib width-to-height ratio on the friction coefficient is performed for different rib pitches. This ratio varies from 0.1 to 6.0. Various rib pitches are considered, from those corresponding to a smooth wall, and up to the pitch-to-rib-height ratio of 16. The pipe …

publication date

  • January 1, 2007