02980nam a2200277 a 4500001001400000003000700014005001700021008004100038020002200079039004700101040000800148090002700156100003000183245015200213260003400365300005500399502010700454504002800561520169900589650002602288650002902314952012102343952013102464999002502595999008202620vtls000073711KUKTEM20251114204549.0130724t2013    my da  f m    000 0 eng d  aTHE0004914(Local) 9a201905131440bSHAHRILJy201307241202zhuda  aUMP  aTP994 .F38 2013 rs Bc.0 aNurul Fatimah Abdul Basir10aInvestigating the effect of polymer molecular weight on drag reduction performance using rotating disk apparatus (RDA) /cNurul Fatimah Abdul Basir  aKuantan, Pahang :bUMP,c2013  axv, 112 p :bill.(some col.) ;c30 cm. +e1 CD-ROM  aProject paper (Bachelor of Chemical Engineering (Gas Technology)) -- Universiti Malaysia Pahang - 2013  aBibliography : p. 77-813 aThe 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.   0aSurface active agents 0aPipelinesxHydrodynamics  00104071a10000b10000d2019-09-04l0oTP994 .F38 2013 rs Bc.p0000074981r2019-09-04 00:00:00t1w2019-09-04yPSM  00104071a10000b10000d2019-09-04l0oCD 7190 | TP994 .F38 2013 rs Bc.p0000074982r2019-09-04 00:00:00t1w2019-09-04yPSM  aVIRTUA40c4191d4197  aVTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5020*5040*5200*6500*6501*9992