Academic Journal
Experimental study of low inertia vortex rings in shear-thinning fluids
| العنوان: | Experimental study of low inertia vortex rings in shear-thinning fluids |
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| المؤلفون: | Bentata, Omar, Anne-Archard, Dominique, Brancher, Pierre |
| المساهمون: | Université des sciences et de la Technologie d'Oran Mohamed Boudiaf Oran (USTO MB), Institut de mécanique des fluides de Toulouse (IMFT), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT) |
| المصدر: | ISSN: 1070-6631. |
| بيانات النشر: | HAL CCSD American Institute of Physics |
| سنة النشر: | 2018 |
| المجموعة: | Université Toulouse III - Paul Sabatier: HAL-UPS |
| مصطلحات موضوعية: | Vortex ring, Non-Newtonian Fluid Mechanics, Shear-thinning fluids, Vortex dynamic, Rheological properties, Laminar flows, Velocimetry, [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] |
| الوصف: | International audience ; The present work investigates experimentally the dynamics of vortex rings in shear-thinning fluids at low generalized Reynolds numbers, with a focus on the range from 300 down to 30. The experimental apparatus consists of a vertical cylinder-piston system with the lower part immersed in a tank filled with the liquid. Particle image velocimetry is used to analyze the influence of the non-Newtonian nature of the fluid on the generation, propagation, and eventual dissipation of vortex rings. The results show that shear-thinning controls the generation phase, whereas the vortex ring subsequent evolution is independent of the power-law index. In particular, it is found that the final dissipation stage is characterized by a flow dynamics which tends ultimately to a regime at a constant viscosity corresponding to the Newtonian plateau. This reveals the role of the Carreau number and of the Reynolds number based on this specific viscosity as relevant control parameters for this last stage. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | hal-01958621; https://hal.science/hal-01958621; https://hal.science/hal-01958621/document; https://hal.science/hal-01958621/file/21314_Bentata.pdf; OATAO: 21314 |
| DOI: | 10.1063/1.5048841 |
| الاتاحة: | https://hal.science/hal-01958621 https://hal.science/hal-01958621/document https://hal.science/hal-01958621/file/21314_Bentata.pdf https://doi.org/10.1063/1.5048841 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.60D5BFAB |
| قاعدة البيانات: | BASE |
| DOI: | 10.1063/1.5048841 |
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