Study of drag reduction by using guar gum and gum Arabic mixtures / Abdul Razzak Kabbara

Abdul Razzak, Kabbara (2021) Study of drag reduction by using guar gum and gum Arabic mixtures / Abdul Razzak Kabbara. Masters thesis, Universiti Malaya.

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Abstract

Since Toms documented drag reduction in 1949, many researched all over the world are exploring different drag reducing agents hoping to better understand the drag reduction phenomenon and hoping to find best agents for different applications. Many drag reducing agents offered great drag reduction but due to their negative effects on the environment, the focus is switching to biopolymers, a natural ecofriendly alternative. So far, few studies explored the potential of biopolymers to reduce drag, and fewer number of studies tested biopolymer mixers. In this research, guar gum and gum Arabic mixtures of three different ratios at 300 ppm concentration were examined using a closed loop piping system. To study drag reduction as well as the mixture’s resistance to heat, two tests were performed for each mixture both at bulk temperature of 30°C. One test without any heating while the other involved continuous heat flux of 3400 W. Several interesting conclusions were found. First, as the ratio of guar gum increased in the mixture, the drag reduction increased. The best drag reduction of 22.65% was achieved by the mixture composed of 50% Guar Gum with 50% Gum Arabic. Finally, for all the fluids considered in the study and for velocities greater than 1 m/s, heating reduced drag reduction.

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