Weisman, M. Jérémy (2017) The quiescent core of turbulent pipe flow with drag reducing polymer additives PRE - Research Project, ENSTA.
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Abstract
Many experimental studies have been conducted in order to reduce the drag in a flow, turbulent pipe flow in particular. A few years ago, experimental data for turbulent pipe flow was collected at the University of Liverpool in order to study drag reduction. The experiments were conducted using water and a solution of water with polymer additives called polyacrylamide. The purpose of the study was to prove that these polymer additives can reduce the drag considerably, and while the conclusion was indeed satisfactory, the data hadn't been used for any other studies. A new conceptual view of turbulent pipe flows is presented via the proposition of 'the quiescent core', uniform momentum zone residing in the center of the pipe. This study shows that a core exists not only within a turbulent flow of water, but for a polyacrylamide concentrated solution as well. There are significant differences in the core's behavior and size between these fluids, and they seem related to the drag reduction.
Item Type: | Thesis (PRE - Research Project) |
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Subjects: | Fluid Mechanics and Energy |
ID Code: | 6924 |
Deposited By: | Jérémy Weisman |
Deposited On: | 17 avr. 2019 16:18 |
Dernière modification: | 17 avr. 2019 16:18 |
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