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Drag Reduction Performance and Turbulent Structure of Polymeric Solutions in Wall-bounded Turbulent Flows
DownloadSpring 2020
The higher drag of turbulent flows relative to laminar flows requires greater pumping power and results in a higher transportation cost. For this reason, reducing drag in turbulent pipe flows is of interest. Among various methods, the use of long-chain polymers has attracted more attention due to...
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Effect of Near-Wall Turbulence on Selective Removal of Particles from Sand Beds Deposited in Pipelines
DownloadFall 2012
A large-scale experimental facility was designed, constructed, and operated to study multiphase flow of solid-liquid mixtures (i.e., slurry flow) in horizontal pipelines. Trains of discrete lenticular deposits (LDs) and continuous beds were identified and studied in detail, representing two...
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Unsteady characteristics of three-dimensional turbulent flow with separation in an asymmetric diffuser
DownloadFall 2017
A great number of studies have been undertaken to understand separated turbulent boundary layers (TBLs) due to its importance in the performance, design and control of many engineering systems (Hal 2000). Flow separation has a complicated three-dimensional nature in many flow configurations...