Experimental  study to reduce the hydraulic resistance of water turbulent flow in pipes by polymer  additives

	Experimental study to reduce the hydraulic resistance of water turbulent flow in pipes by polymer additives
Al-Qadisiyah Journal for Engineering Sciences
Article 1, Volume 4, Issue 3, 2011, Pages 0-0 PDF (0 K)
Abstract
The aim of this research is to study the effect of polymeric additives to water on friction coefficient change in a turbulent pipe flow which would cause in reduction of drag resistance. Experiment is done using the polyacrylamide ( PAM ) as polymeric additive to show the effect of addition of ( PAM ) with case low concentrations (0.005,0.013 , 0.025%) on the friction factor (λ) . The results show that the addition of (PAM) will reduce (λ) with a range from 6.51 to 37.95% comparable with the friction coefficient (λ) for water before addition in a turbulent flow case. Also a study of the addition effect of ( PAM ) with different concentrations between ( 0.005 – 0.06% ) on the reduction percent of (λ) is carried out . The results show increasing the effect of the addition (PAM ) cause in increasing the reduction percent Δλ / λ % with a range of 6.51 to 44.62% . It is found that the peak values called the optimum values)Cp*(of PAM between 0.03&0.042. Increasing the addition of PAM cause in decreasing the effect of reduction percent with concentrations at several Reynolds number as follows: ( Re = 25350 & 0.03%, Re = 28355& 0.033 % , Re=34981&0.038 % , Re=39360 & 0.039% , Re=44985 &0.042%).
Keywords
Polyacrylamide Polymer; Friction factor; Reynolds Number; Reduction percentage

Statistics Article View: 213 PDF Download: 100