Autor segons l'article: David, J S; Vernet, A; Grau, F X; Pallares, J
Departament: Enginyeria Mecànica
Autor/s de la URV: Grau Vidal, Francesc Xavier / Pallarés Curto, Jorge María / Vernet Peña, Antonio
Paraules clau: Topology Simulations Periodic-flow Onset Enclosed cylinder Chaotic advection Cellular-flow Bubbles Axisymmetrical vortex breakdown
Resum: In this paper, we analyse the flowin a cylindrical cavity of aspect ratioH/R = 2, with a top lid rotating with a sinusoidal time-varying speed. The Reynolds numbers, based on the time-averaged rotating speed and the radius of the cavity (Re = Omega R-0(2)/nu) are 2800, 3500 and 4100. Particle Image velocimetry measurements and numerical simulations are performed to determine the effect on the flow of different imposed frequencies on the rotating lid. The acceleration and deceleration of the lid produce a marked pulsatile flow behaviour. It is found that at low Reynolds numbers the frequencies measured in the flow coincide with the frequency imposed on the rotating lid, while at the largest Re considered the flow frequencies are significantly lower, especially when the frequency of the disk is large. The fluctuations induced in the vertical velocity component are about 100% of the instantaneous values while for the angular component the fluctuations are of the same order as the instantaneous values.
Àrees temàtiques: Mechanics Mechanical engineering Matemática / probabilidade e estatística Interdisciplinar Engenharias iii Engenharias i Computational mechanics Ciência da computação Astronomia / física
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: anton.vernet@urv.cat francescxavier.grau@urv.cat jordi.pallares@urv.cat
Identificador de l'autor: 0000-0002-7028-1368 0000-0002-4077-7338 0000-0003-0305-2714
Data d'alta del registre: 2024-10-12
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: Acta Mechanica. 233 (3): 1107-1124
Referència de l'ítem segons les normes APA: David, J S; Vernet, A; Grau, F X; Pallares, J (2022). Experimental and numerical investigation of the flow in a cylindrical cavity with an unsteady rotating lid. Acta Mechanica, 233(3), 1107-1124. DOI: 10.1007/s00707-022-03152-3
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2022
Tipus de publicació: Journal Publications
Repositori URV