NDLI: Measurement of temperature profiles in turbulent pipe flow of polymer and surfactant drag-reducing solutions

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Measurement of temperature profiles in turbulent pipe flow of polymer and surfactant drag-reducing solutions

Content Provider	Semantic Scholar
Author	Gasljevic, Kazimir Aguilar, Guillermo Matthys, Eric F.
Copyright Year	2007
Abstract	A device was built to measure temperature profiles of turbulent pipe flows of various drag-reducing fluids. It is easy to use and reliable. We measured temperature profiles over a range of conditions leading to accurate measurements down to y+ 10, for tests carried over Reynolds numbers Re between 10 000 and 90 000. The effects of high heat fluxes and buoyancy, in particular, were quantified to ascertain the parameter range for accurate measurements. Temperature profiles measured for type-A polymer solution and for cationic surfactant solutions allowed us to see strong similarity between velocity and temperature profiles for drag-reducing surfactant solutions. A comparison between the slopes of the thermal and velocity buffer layers resulted in calculated turbulent Prandtl numbers between 6 and 9 for those drag-reducing solutions. We also used this tool to investigate drag reduction for a nonionic surfactant solution, which showed a significantly different fan-type profile, and also for a type-B drag-reducing polymer solution Xanthan gum . © 2007 American Institute of Physics. DOI: 10.1063/1.2770257
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.ee.ucr.edu/~gaguilar/PUBLICATIONS/J46.pdf
Alternate Webpage(s)	http://www.engr.ucr.edu/~gaguilar/PUBLICATIONS/J46.pdf
Language	English
Access Restriction	Open
Subject Keyword	Buffers Digital Object Identifier Flow Gingiva Gum Arabic Liquid substance Pipe rolls Polymer Population Parameter Solutions Turbulence Velocity (software development) anatomical layer fangchinoline slope
Content Type	Text
Resource Type	Article

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