Airflow driven fluid–structure interaction subjected to aqueous-based liquid spraying
| Autor: | Xavier Pelorson, Anne Bouvet, A. Van Hirtum |
|---|---|
| Přispěvatelé: | Laboratoire des Écoulements Géophysiques et Industriels [Grenoble] (LEGI), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Mechanical Engineering Airflow Computational Mechanics Mixing (process engineering) Reynolds number Mechanics Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph] symbols.namesake medicine.anatomical_structure Volume (thermodynamics) Mechanics of Materials Vocal folds 0103 physical sciences medicine symbols Artificial Saliva Spray Wetting 010306 general physics Human voice |
| Zdroj: | Physics of Fluids Physics of Fluids, American Institute of Physics, 2020, 32 (8), pp.081901. ⟨10.1063/5.0015587⟩ |
| ISSN: | 1070-6631 1089-7666 |
| Popis: | International audience; Artificial saliva sprays are commonly used to remedy vocal folds surface hydration. Vocal folds surface hydration and its effect on their auto-oscillation are studied experimentally using artificial vocal folds. The airflow is used to excite the vocal folds into auto-oscillation after whichthe vocal folds surface is sprayed with a liquid. The validity of the findings described in a previous study [A. Bouvet, X. Pelorson, and A. VanHirtum, “Influence of water spraying on an oscillating channel,” J. Fluids Struct.93, 102840 (2020)] concerning the effect of water sprayingis further investigated. First, artificial saliva sprays (up to 5 ml) are sprayed instead of water. It is shown that this allows us to address theeffect of increased dynamic viscosity (up to 8 times compared to water) as other artificial saliva properties affecting air–liquid mixing andsurface wettability remain similar to water. Second, the Reynolds number in the dry stage is systematically increased (with 60%) for constantspraying volume≥3 ml. Regardless of the sprayed liquid and Reynolds number, oscillation cycles are characterized by an increase in meanupstream pressure, cycle-to-cycle variability, and a decrease in oscillation frequency due period doubling. Increasing the dynamic viscositytends to reduce the magnitude of these tendencies for spraying volumes smaller than 3 ml, indicating that viscous liquid–gas mixing affectsthe flow regime. Systematic Reynolds number variation shows that liquid spraying increases the oscillation onset threshold pressure and thatthe magnitude of general tendencies is reduced. The assessed conditions and features are pertinent to human voice production after hydrationwith an artificial saliva spray burst. |
| Databáze: | OpenAIRE |
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