Drag Reduction in Turbulent Flows by Polymer and Fiber Additives
This article provides a review of the recent progress in understanding and predicting additives-induced drag reduction (DR) in turbulent wall-bounded shear flows. We focus on the reduction in friction losses by the dilute addition of high-molecular weight polymers and/or fibers to flowing liquids. A...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Hosokawa Powder Technology Foundation
2020-04-01
|
| Series: | KONA Powder and Particle Journal |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/kona/38/0/38_2021009/_html/-char/en |
| _version_ | 1818672163537813504 |
|---|---|
| author | Cristian Marchioli Marina Campolo |
| author_facet | Cristian Marchioli Marina Campolo |
| author_sort | Cristian Marchioli |
| collection | DOAJ |
| description | This article provides a review of the recent progress in understanding and predicting additives-induced drag reduction (DR) in turbulent wall-bounded shear flows. We focus on the reduction in friction losses by the dilute addition of high-molecular weight polymers and/or fibers to flowing liquids. Although it has long been reasoned that the dynamical interactions between polymers/fibers and turbulence are responsible for DR, it was not until recently that progress was made in elucidating these interactions in detail. Advancements come largely from numerical simulations of viscoelastic turbulence and detailed measurements in turbulent flows of polymer/fiber solutions. Their impact on current understanding of the mechanics and prediction of DR is discussed, and perspectives for further advancement of knowledge are provided. |
| first_indexed | 2024-12-17T07:35:32Z |
| format | Article |
| id | doaj.art-bd904046b6014b54923baef6595a93c4 |
| institution | Directory Open Access Journal |
| issn | 0288-4534 2187-5537 |
| language | English |
| last_indexed | 2024-12-17T07:35:32Z |
| publishDate | 2020-04-01 |
| publisher | Hosokawa Powder Technology Foundation |
| record_format | Article |
| series | KONA Powder and Particle Journal |
| spelling | doaj.art-bd904046b6014b54923baef6595a93c42022-12-21T21:58:20ZengHosokawa Powder Technology FoundationKONA Powder and Particle Journal0288-45342187-55372020-04-01380648110.14356/kona.2021009konaDrag Reduction in Turbulent Flows by Polymer and Fiber AdditivesCristian Marchioli0Marina Campolo1Department of Engineering and Architecture, University of Udine, ItalyDepartment of Engineering and Architecture, University of Udine, ItalyThis article provides a review of the recent progress in understanding and predicting additives-induced drag reduction (DR) in turbulent wall-bounded shear flows. We focus on the reduction in friction losses by the dilute addition of high-molecular weight polymers and/or fibers to flowing liquids. Although it has long been reasoned that the dynamical interactions between polymers/fibers and turbulence are responsible for DR, it was not until recently that progress was made in elucidating these interactions in detail. Advancements come largely from numerical simulations of viscoelastic turbulence and detailed measurements in turbulent flows of polymer/fiber solutions. Their impact on current understanding of the mechanics and prediction of DR is discussed, and perspectives for further advancement of knowledge are provided.https://www.jstage.jst.go.jp/article/kona/38/0/38_2021009/_html/-char/enturbulencedrag reductionpolymersfibers |
| spellingShingle | Cristian Marchioli Marina Campolo Drag Reduction in Turbulent Flows by Polymer and Fiber Additives KONA Powder and Particle Journal turbulence drag reduction polymers fibers |
| title | Drag Reduction in Turbulent Flows by Polymer and Fiber Additives |
| title_full | Drag Reduction in Turbulent Flows by Polymer and Fiber Additives |
| title_fullStr | Drag Reduction in Turbulent Flows by Polymer and Fiber Additives |
| title_full_unstemmed | Drag Reduction in Turbulent Flows by Polymer and Fiber Additives |
| title_short | Drag Reduction in Turbulent Flows by Polymer and Fiber Additives |
| title_sort | drag reduction in turbulent flows by polymer and fiber additives |
| topic | turbulence drag reduction polymers fibers |
| url | https://www.jstage.jst.go.jp/article/kona/38/0/38_2021009/_html/-char/en |
| work_keys_str_mv | AT cristianmarchioli dragreductioninturbulentflowsbypolymerandfiberadditives AT marinacampolo dragreductioninturbulentflowsbypolymerandfiberadditives |