1971 Volume 4 Issue 2 Pages 135-140
In this paper, a fully developed turbulent flow of water in a porous-wall tube with suction or injection flow through the wall was experimentally studied. The experimental runs were executed at a fixed value of Reynolds number of inlet flow at about 25000 and with varying vw√u from -1.78×10-3 to 4.16×10-3.
The radial velocity component is almost linear, but it is found that the radial distribution of shear stress becomes non-linear as the mass flux through the wall becomes larger.
The mixing lengths in the flow with and without mass flux are correlated by a Reichardttype equation and the normalized values of eddy diflFusivity are also correlated with a single equation. The measurements of the local and average friction factor are in good agreement with predictions by the film theory.