Yao, G, Zhao, J orcid.org/0000-0002-8714-7798, Yang, H et al. (2 more authors) (2019) Effects of salinity on the onset of elastic turbulence in swirling flow and curvilinear microchannels. Physics of Fluids, 31 (12). 123106. ISSN 1070-6631
Abstract
Elastic turbulence, which is sensitive to geometry and polymer rheology, has shown great potential for improving the performance of mixing, heat transfer, and even oil recovery. Recent studies showed the importance of the rheological properties of polymer solutions on the onset of elastic turbulence. However, variations of rheological properties based on polymer sensitivities such as salinity and its corresponding effects on the elastic turbulence have not been revealed. This work investigated systematically the effects of salinity on the onset of elastic turbulence in both swirling flow and curvilinear microchannels. The variations of statistical properties, such as probability distribution functions (PDFs) and power spectral density of injected power (PSD), were analyzed for characterization. The onset conditions of elastic turbulence are postponed by high salinity, which is consistent with the mixing performance in a curvilinear microchannel. A salinity independent power-law exponent at a value of −4.3 is observed in a fully developed elastic regime for all polymer solutions. Particularly, the diffusion of fluorescein at a low flow rate in the microchannel is possible due to the existence of a steady secondary flow before the onset of elastic instability.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 Author(s). This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Yao, G, Zhao, J , Yang, H et al. (2 more authors) (2019) Effects of salinity on the onset of elastic turbulence in swirling flow and curvilinear microchannels. Physics of Fluids, 31 (12). 123106. ISSN 1070-6631, and may be found at https://doi.org/10.1063/1.5120459. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) |
Funding Information: | Funder Grant number EU - European Union 648375 British Council, China 352635180 |
Depositing User: | Symplectic Publications |
Date Deposited: | 06 Jan 2020 11:10 |
Last Modified: | 01 Jul 2020 22:48 |
Status: | Published |
Publisher: | AIP Publishing |
Identification Number: | 10.1063/1.5120459 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:155140 |