In this paper an experimental investigation is carried out in order to study the effect of concentration of coarse roughness elements on the friction factor. The investigation has shown that it is possible to represent indirectly the effects of concentration by using d84 or d90 as characteristic diameters.
No takes yet. Share an insight, caveat, or question.
Ferro et al. (1991) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: