000014657 001__ 14657
000014657 005__ 20161115100158.0
000014657 04107 $$aeng
000014657 046__ $$k2016-08-21
000014657 100__ $$aJuel, Anne
000014657 24500 $$aSensitivity of Saffman-Taylor fingers to channel depth perturbations

000014657 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014657 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014657 506__ $$arestricted
000014657 520__ $$2eng$$aWe examine the sensitivity of Saffman-Taylor fingers to controlled variations in channel depth by investigating the effects of centred, rectangular occlusions in Hele-Shaw channels of increasing aspect ratio using a combination of experiments and numerical simulations of a depth-averaged lubrication model. The system is characterised by multiple modes of propagation which are first provoked for decreasing relative depth changes as the aspect ratio increases. We estimate that the required depth-changes become of the same order as the typical roughnesses of the experimental system (1 µm) for aspect ratios beyond 155, which we conjecture underlies the extreme sensitivity of experiments conducted in such (unoccluded) Hele-Shaw channels [1].

000014657 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014657 653__ $$a

000014657 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014657 720__ $$aJuel, Anne
000014657 8560_ $$ffischerc@itam.cas.cz
000014657 8564_ $$s95829$$uhttps://invenio.itam.cas.cz/record/14657/files/TS.FM11-1.02.pdf$$yOriginal version of the author's contribution as presented on CD,  page 1194, code TS.FM11-1.02
.
000014657 962__ $$r13812
000014657 980__ $$aPAPER