Effect of Guar Gum and Hydroxyethyl Cellulose on skin-friction drag of turbulent flow in a pipe
The aim of this study is to investigate experimentally the effect of bio-polymers in the process of drag reduction in a single phase water flow at high Reynolds number. By using biopolymers, makes the entire process of polymer induced drag reduction economical and more versatile. A comparative study has been carried out using two high molecular weight bio-polymers guar gum (GG) and hydroxyethyl cellulose (HEC). These two additives of different concentrations and flow rates, taken as parameters of study to observe the influence in drag reduction. From this study, it is found that there is significant decrease in skin friction drag with increase in concentration of polymer solutions. The results found, are further validated with the universally accepted maximum drag reduction (MDR) asymptote or Virk's asymptote. The mechanical degradation of the polymers due to the centrifugal pump is also studied and found that hydroxyethyl cellulose (HEC) has better shelf-life stability than the guar gum (GG).The pH of each concentration of the polymer solutions is also measured.