Experimental Investigation of Friction Coefficient in Ribleted Pipes and the Effect of Fine Particles
Publish Year: 1377
Type: Journal paper
Language: English
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Document National Code:
JR_IJE-11-2_004
Index date: 10 March 2022
Experimental Investigation of Friction Coefficient in Ribleted Pipes and the Effect of Fine Particles abstract
The effect of fine particles on turbulence damping and reduction of flow friction coefficient in ribleted pipes, have been investigated experimentally. Tests have been conducted in a ribleted pipe with hydraulic diameter of 18.6 mm, and 20 stream wise riblets of 1.8 mm depth, along the pipe. Flows of water tap with Reynolds number from 5000 to 30000 were compared with flows containing silt-clay particles and stone powder of less than 63 micron sizes. In the flows containing 1.6 kg/in3 of stone powder, the pressure drop along the pipe reduced by 25 percent, and with flows containing silt-clay particles, the pressure drop reduction was about 15 percent. Reduction of friction, in flows containing fine particles, may be due to the interaction of particles and turbulence generated at pipe boundary, and damping of this turbulence.
Experimental Investigation of Friction Coefficient in Ribleted Pipes and the Effect of Fine Particles Keywords:
Experimental Investigation of Friction Coefficient in Ribleted Pipes and the Effect of Fine Particles authors
B. Firoozabadi
Mechanical Engineering, Sharif University of Technology
M. Rad
Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran