02704nam a2200253 a 4500 vtls000073711 KUKTEM 20251114204549.0 130724t2013 my da f m 000 0 eng d THE0004914(Local) 201905131440 SHAHRILJ 201307241202 huda UMP TP994 .F38 2013 rs Bc. Nurul Fatimah Abdul Basir Investigating the effect of polymer molecular weight on drag reduction performance using rotating disk apparatus (RDA) / Nurul Fatimah Abdul Basir Kuantan, Pahang : UMP, 2013 xv, 112 p : ill.(some col.) ; 30 cm. + 1 CD-ROM Project paper (Bachelor of Chemical Engineering (Gas Technology)) -- Universiti Malaysia Pahang - 2013 Bibliography : p. 77-81 The investigation of turbulent drag reduction, which is caused by the addition of a small amount of polymer or some other substances to the liquids flowing systems has been the focus of attention of many scientists for the last decades. Due to the reduction of the drag, pumping power for the pipeline will significantly reduced and thus will decrease the cost of electricity in total production cost. In this study, the effect of the presence of a drag reducing agent (DRA) and its variety of molecular weight on the torque produced in rotating disk apparatus containing water is investigated. The experimental procedure was divided into three parts; obtaining several different polymer molecular weights using ultrasonication method, testing the water using different polymer molecular weight at different polymer concentration and lastly is adding the different concentration of surfactant in the fixed concentration of water- polymer solution. Three polymer molecular weights are obtained by using ultrasonificator method with value of 11.7967 x106 g/mol, 4.830 x106 g/mol and 1.7179 x106 g/mol. A drastic reduction of drag in the turbulent flow of solutions as evaluated with torque differences in comparison to the pure solvent can be observed, even when only minute amounts of the additives are added. The percentage of drag reduction is relatively increases as we increase the polymer molecular weight and polymer concentration. A maximum drag reduction of 47.62% has been observed at polymer molecular weight of 11. 7697 x106 with polymer concentration of 200 ppm. In polymer- surfactant complex solution, 29% of drag reduction were reported with surfactant concentration of 2000ppm. Surface active agents Pipelines Hydrodynamics 0 0 0 1 10000 10000 2019-09-04 0 TP994 .F38 2013 rs Bc. 0000074981 2019-09-04 00:00:00 1 2019-09-04 PSM 0 0 0 1 10000 10000 2019-09-04 0 CD 7190 | TP994 .F38 2013 rs Bc. 0000074982 2019-09-04 00:00:00 1 2019-09-04 PSM VIRTUA40 4191 4197 VTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5020*5040*5200*6500*6501*9992