Modulation of elasto-inertial transitions in Taylor–Couette flow by small particles
| Autor: | Neil Cagney, Stavroula Balabani, Theofilos Boulafentis, Tom Lacassagne |
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| Přispěvatelé: | Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Nord Europe), Institut Mines-Télécom [Paris] (IMT) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Inertial frame of reference
Materials science Turbulence Mechanical Engineering Taylor–Couette flow Laminar flow Mechanics Condensed Matter Physics 01 natural sciences Viscoelasticity 010305 fluids & plasmas Condensed Matter::Soft Condensed Matter Physics::Fluid Dynamics Flow (mathematics) Mechanics of Materials 0103 physical sciences Volume fraction [SDE]Environmental Sciences Particle 010306 general physics |
| Zdroj: | Journal of Fluid Mechanics Journal of Fluid Mechanics, Cambridge University Press (CUP), 2021, 929, ⟨10.1017/jfm.2021.861⟩ |
| ISSN: | 0022-1120 1469-7645 |
| DOI: | 10.1017/jfm.2021.861⟩ |
| Popis: | Particle suspensions in non-Newtonian liquid matrices are frequently encountered in nature and industrial applications. We here study the Taylor–Couette flow (TCF) of semidilute spherical particle suspensions (volume fraction $\leq 0.1$ ) in viscoelastic, constant-viscosity liquids (Boger fluids). We describe the influence of particle load on various flow transitions encountered in TCF of such fluids, and on the nature of these transitions. Particle addition is found to delay the onset of first- and second-order transitions, thus stabilising laminar flows. It also renders them hysteretic, suggesting an effect on the nature of bifurcations. The transition to elasto-inertial turbulence (EIT) is shown to be delayed by the presence of particles, and the features of EIT altered, with preserved spatio-temporal large scales. These results imply that particle loading and viscoelasticity, which are known to destabilise the flow when considered separately, can on the other hand compete with one another and ultimately stabilise the flow when considered together. |
| Databáze: | OpenAIRE |
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