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Switching between different types of stability isles in films over topographies

Title data

Schörner, Mario ; Reck, Daniel ; Aksel, Nuri ; Trifonov, Yuri:
Switching between different types of stability isles in films over topographies.
In: Acta Mechanica. Vol. 229 (1 February 2018) Issue 2 . - pp. 423-436.
ISSN 1619-6937
DOI: https://doi.org/10.1007/s00707-017-1979-0

Project information

Project financing: DAAD (Teilfinanzierung Y. T.)

Abstract in another language

In the present study, we performed comprehensive experiments and direct Navier-Stokes computations on the linear stability of gravity-driven film flows. We focused on the switching between different types of stability isles, appearing in viscous films over inclined topographies, which describes an abrupt change of the flow's free-surface stability. We systematically varied the inclination angle, the liquid, the substrate's shape and the corrugation's periodicity and uncovered when this phenomenon appears and how it proceeds. Our combined experimental and numerical work unveiled that the switching is of a universal nature as it can be induced by a slight variation of one of the multitude of completely differing parameters mentioned above. The in-depth investigation of this phenomenon presented in this article is of interest for the technical exploitation of film flows as it puts the reader into the position to avoid high-risk situations where a small change of the system's configuration leads to a significantly different system response.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: Special Issue dedicated to the memory of Franz Ziegler
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: 28 Mar 2018 06:32
Last Modified: 17 Apr 2018 06:14
URI: https://eref.uni-bayreuth.de/id/eprint/43158