Drag Reduction on a Rotating Disk Using a Polymer Additive
Author: C. Gorman Gilbert
Publisher:
Published: 1969
Total Pages: 16
ISBN-13:
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Author: C. Gorman Gilbert
Publisher:
Published: 1969
Total Pages: 16
ISBN-13:
DOWNLOAD EBOOKAuthor: C. Sinclair Wells
Publisher: Springer
Published: 2013-12-20
Total Pages: 497
ISBN-13: 1489955798
DOWNLOAD EBOOKAuthor: United States. Coast Guard
Publisher:
Published: 1974
Total Pages: 204
ISBN-13:
DOWNLOAD EBOOKAuthor: Johannes Krzywinski Lunde
Publisher:
Published: 1966
Total Pages: 1182
ISBN-13:
DOWNLOAD EBOOKAuthor: Nurul Fatimah Abdul Basir
Publisher:
Published: 2013
Total Pages: 112
ISBN-13:
DOWNLOAD EBOOKThe 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.
Author:
Publisher:
Published: 1971
Total Pages: 776
ISBN-13:
DOWNLOAD EBOOKAuthor: United States. National Bureau of Standards
Publisher:
Published: 1969
Total Pages: 342
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1970
Total Pages: 360
ISBN-13:
DOWNLOAD EBOOKAuthor: United States. National Bureau of Standards
Publisher:
Published: 1968
Total Pages: 696
ISBN-13:
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