Research output: Contribution to journal › Article › peer-review
Switching between different types of stability isles in films over topographies. / Schörner, Mario; Reck, Daniel; Aksel, Nuri et al.
In: Acta Mechanica, Vol. 229, No. 2, 01.02.2018, p. 423-436.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Switching between different types of stability isles in films over topographies
AU - Schörner, Mario
AU - Reck, Daniel
AU - Aksel, Nuri
AU - Trifonov, Yuri
PY - 2018/2/1
Y1 - 2018/2/1
N2 - 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.
AB - 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.
KW - SOLITARY WAVE DYNAMICS
KW - THIN LIQUID-FILMS
KW - INCLINED PLANE
KW - PERIODIC WALL
KW - FLOW
KW - EVOLUTION
KW - SURFACE
KW - INSTABILITIES
UR - http://www.scopus.com/inward/record.url?scp=85031935669&partnerID=8YFLogxK
U2 - 10.1007/s00707-017-1979-0
DO - 10.1007/s00707-017-1979-0
M3 - Article
AN - SCOPUS:85031935669
VL - 229
SP - 423
EP - 436
JO - Acta Mechanica
JF - Acta Mechanica
SN - 0001-5970
IS - 2
ER -
ID: 9875330