Imperial College London

ProfessorChristosMarkides

Faculty of EngineeringDepartment of Chemical Engineering

Professor of Clean Energy Technologies
 
 
 
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Contact

 

+44 (0)20 7594 1601c.markides Website

 
 
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Location

 

404ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Voulgaropoulos:2019:10.1002/aic.16662,
author = {Voulgaropoulos, V and Zadrazil, I and Le, Brun N and Bismarck, A and Markides, CN},
doi = {10.1002/aic.16662},
journal = {AIChE Journal},
title = {On the link between experimentallymeasured turbulence quantities and polymerinduced drag reduction in pipe flows},
url = {http://dx.doi.org/10.1002/aic.16662},
year = {2019}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - In this study, we investigate the hydrodynamics of polymerinduced drag reduction in horizontal turbulent pipe flows. We provide spatiotemporally resolved information of velocity and its gradients obtained with particle image velocimetry (PIV) measurements in solutions of water with dissolved polyethylene oxide (PEO) of three different molecular weights, at various dilute concentrations and with flow Reynolds numbers from 35, 000 to 210, 000. We find that the local magnitudes of important turbulent flow variables correlate with the measured levels of drag reduction irrespective of the flow Reynolds number, polymer weight and concentration. Contour maps illustrate the spatial characteristics of this correlation. A relationship between the drag reduction and the turbulent flow variables is found. The effects of the polymer molecular weight, its concentration and the Reynolds number on the flow are further examined through joint probability distributions of the fluctuations of the streamwise and spanwise velocity components.
AU - Voulgaropoulos,V
AU - Zadrazil,I
AU - Le,Brun N
AU - Bismarck,A
AU - Markides,CN
DO - 10.1002/aic.16662
PY - 2019///
SN - 0001-1541
TI - On the link between experimentallymeasured turbulence quantities and polymerinduced drag reduction in pipe flows
T2 - AIChE Journal
UR - http://dx.doi.org/10.1002/aic.16662
UR - http://hdl.handle.net/10044/1/70287
ER -