Drag Reduction in Hydraulic Transport of Solids

by Michael Proeh, Visiting Prof.; Univ. of Iowa; on leave from Technion-Israel Inst. of Technol., Haifa, Israel,
Jacques L. Zakin, Visiting Prof. of Chem. Engrg.; Technion-Israel Inst. of Technol., Haifa, Israel,
Aviel Brosh, Grad Asst.; Technion-Israel Inst. of Technol., Haifa, Israel,
Moshe Warshavsky, Sr. Technician; Technion-Israel Inst. of Technol., Haifa, Israel,


Serial Information: Journal of the Hydraulics Division, 1970, Vol. 96, Issue 4, Pg. 903-909


Document Type: Journal Paper

Abstract: It is demonstrated that small amounts of complex soap, cetyl trimethyl-ammonium bromide (CTAB-1-Naphthol), can reduce the pressure drop and the critical velocities in the transport of solid suspensions in pipes. The properties of the soap solution and their dependence on CTAB-1-Naphthol ratio, concentration, temperature and storage duration were also investigated. The minimum energy required to pump a slurry of 20% (in volume) quartz sand in a 0.18% soap solution was found to be 30% of that in pure water. Polymer solutions were not found to be as effective in reducing the pressure drops.

Subject Headings: Pressure pipes | Solid mechanics | Fluid velocity | Turbidity | Temperature effects | Hydro power | Pumps | Slurries

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