... transfer rate compared to a pipe without any insert. The results illustrate that the axial velocity of turbulent flow near the leading edges of the vortex generators is relatively higher than the other areas. Physically speaking, the strong current through the holes of the PVRW inserts is one of the main...

...Yan Cao; Yu Bai; Jiang Du; Saman Rashidi In the present study, turbulent flow of a Cu-water nanofluid through a porous cavity is investigated using a numerical method. Two rotating cylinders with different temperatures are placed inside the porous enclosure to generate turbulent structures. Forced...

... of the unsteady vortices and turbulent flow structures in the cooling wall jet streams. The detailed flow field measurements were correlated with the adiabatic cooling effectiveness maps measured by using pressure sensitive paint technique to reveal underlying physics. He and coworkers [ 24 , 25 ] studied...

... factor was obtained. Indeed, a new friction factor correlation was obtained, but now formulated in terms of direct measurement of roughness. Friction Factor Turbulent Flow Wall Roughness Pressure Drop Natural Gas 3 Power spectral density of measured wall roughness pipe 1-4 Flow...