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The stability cycle : A universal pathway for the stability of films over topography

Title data

Schörner, Mario ; Aksel, Nuri:
The stability cycle : A universal pathway for the stability of films over topography.
In: Physics of Fluids. Vol. 30 (1 January 2018) Issue 1 . - 012105. - 16 S..
ISSN 1527-2435
DOI: https://doi.org/10.1063/1.5003449

Official URL: Volltext

Project information

Project financing: Andere

Abstract in another language

In the present study on the linear stability of gravity-driven Newtonian films flowing over inclined topographies, we consider a fundamental question: Is there a universal principle, being valid to describe the parametric evolution of the flow’s stability chart for variations of different system parameters? For this sake, we first screened all experimental and numerical stability charts available in the literature. In a second step, we performed experiments to fill the gaps which remained. Variations of the fluid’s viscosity and the topography’s specific shape, amplitude, wavelength, tip width, and inclination were considered. That way, we identified a set of six characteristic patterns of stability charts to be sufficient to describe and unify all results on the linear stability of Newtonian films flowing over undulated inclines. We unveiled a universal pathway—the stability cycle—along which the linear stability charts of all considered Newtonian films flowing down periodically corrugated inclines evolved when the system parameters were changed.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science > Chair Applied Mechanis and Fluid Dynamics
Faculties > Faculty of Engineering Science > Chair Applied Mechanis and Fluid Dynamics > Chair Applied Mechanis and Fluid Dynamics - Univ.-Prof. Dr. Nuri Aksel
Faculties
Faculties > Faculty of Engineering Science
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 24 Jan 2018 10:10
Last Modified: 08 Feb 2018 09:40
URI: https://eref.uni-bayreuth.de/id/eprint/42009