Dual vortex breakdown in a two-fluid whirlpool

Abstract Looking for an optimal flow shape for culture growth in vortex bioreactors, an intriguing and impressive structure has been observed that mimics the strong swirling flows in the atmosphere (tornado) and ocean (waterspout). To better understand the flow nature and topology, this experimental...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Sergey G. Skripkin, Bulat R. Sharifullin, Igor V. Naumov, Vladimir N. Shtern
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1042fcba293f482eb03e21e0cb2249d3
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:1042fcba293f482eb03e21e0cb2249d3
record_format	dspace
spelling	oai:doaj.org-article:1042fcba293f482eb03e21e0cb2249d32021-12-05T12:15:59ZDual vortex breakdown in a two-fluid whirlpool10.1038/s41598-021-02514-62045-2322https://doaj.org/article/1042fcba293f482eb03e21e0cb2249d32021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-02514-6https://doaj.org/toc/2045-2322Abstract Looking for an optimal flow shape for culture growth in vortex bioreactors, an intriguing and impressive structure has been observed that mimics the strong swirling flows in the atmosphere (tornado) and ocean (waterspout). To better understand the flow nature and topology, this experimental study explores the development of vortex breakdown (VB) in a lab-scale swirling flow of two immiscible fluids filling a vertical cylindrical container. The rotating bottom disk drives the circulation of both fluids while the sidewall is stationary. The container can be either sealed with the still top disk (SC) or open (OC). As the rotation strength (Re) increases, a new circulation cell occurs in each fluid—the dual VB. In case SC, VB first emerges in the lower fluid at Re = 475 and then in the upper fluid at Re = 746. In case OC, VB first emerges in the upper fluid at Re = 524 and then in the lower fluid at Re = 538. The flow remains steady and axisymmetric with the interface and the free surface being just slightly deformed in the studied range of Re. Such two-VB swirling flows can provide efficient mixing in aerial or two-fluid bioreactors.Sergey G. SkripkinBulat R. SharifullinIgor V. NaumovVladimir N. ShternNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sergey G. Skripkin Bulat R. Sharifullin Igor V. Naumov Vladimir N. Shtern Dual vortex breakdown in a two-fluid whirlpool
description	Abstract Looking for an optimal flow shape for culture growth in vortex bioreactors, an intriguing and impressive structure has been observed that mimics the strong swirling flows in the atmosphere (tornado) and ocean (waterspout). To better understand the flow nature and topology, this experimental study explores the development of vortex breakdown (VB) in a lab-scale swirling flow of two immiscible fluids filling a vertical cylindrical container. The rotating bottom disk drives the circulation of both fluids while the sidewall is stationary. The container can be either sealed with the still top disk (SC) or open (OC). As the rotation strength (Re) increases, a new circulation cell occurs in each fluid—the dual VB. In case SC, VB first emerges in the lower fluid at Re = 475 and then in the upper fluid at Re = 746. In case OC, VB first emerges in the upper fluid at Re = 524 and then in the lower fluid at Re = 538. The flow remains steady and axisymmetric with the interface and the free surface being just slightly deformed in the studied range of Re. Such two-VB swirling flows can provide efficient mixing in aerial or two-fluid bioreactors.
format	article
author	Sergey G. Skripkin Bulat R. Sharifullin Igor V. Naumov Vladimir N. Shtern
author_facet	Sergey G. Skripkin Bulat R. Sharifullin Igor V. Naumov Vladimir N. Shtern
author_sort	Sergey G. Skripkin
title	Dual vortex breakdown in a two-fluid whirlpool
title_short	Dual vortex breakdown in a two-fluid whirlpool
title_full	Dual vortex breakdown in a two-fluid whirlpool
title_fullStr	Dual vortex breakdown in a two-fluid whirlpool
title_full_unstemmed	Dual vortex breakdown in a two-fluid whirlpool
title_sort	dual vortex breakdown in a two-fluid whirlpool
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/1042fcba293f482eb03e21e0cb2249d3
work_keys_str_mv	AT sergeygskripkin dualvortexbreakdowninatwofluidwhirlpool AT bulatrsharifullin dualvortexbreakdowninatwofluidwhirlpool AT igorvnaumov dualvortexbreakdowninatwofluidwhirlpool AT vladimirnshtern dualvortexbreakdowninatwofluidwhirlpool
_version_	1718372058928250880

Dual vortex breakdown in a two-fluid whirlpool

Ejemplares similares