000015240 001__ 15240
000015240 005__ 20161115100215.0
000015240 04107 $$aeng
000015240 046__ $$k2016-08-21
000015240 100__ $$aCreyts, Timothy
000015240 24500 $$aRecirculating Ice Eddies in Subglacial Valleys

000015240 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000015240 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000015240 506__ $$arestricted
000015240 520__ $$2eng$$aIn many locations beneath both Greenland and Antarctica, ice flows across deep valleys, potentially forming viscous eddies that can lead to stratigraphic folds. We use a set up analogous to Moffatt [1], where our domain is a subglacial valley. We numerically solve the non-Newtonian Stokes equations with a shear-thinning power-law rheology to determine the critical valley angle for the eddies to form. Shear-thinning fluids allows for greater shear localization and, therefore, ice requires smaller valley angles (steeper slopes) to form eddies than a Newtonian fluid. Due to the significant variation of temperature from the warm base to the cold surface of the ice, we analyze eddy formation when the rheology is temperature dependent. The warmer basal ice is less viscous and eddies form in larger valley angles (shallower slopes). Finally, we solve for the ice flow over topography from the Gamburtsev subglacial mountains and show Moffatt eddies in the subglacial valleys.

000015240 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015240 653__ $$a

000015240 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000015240 720__ $$aCreyts, Timothy
000015240 8560_ $$ffischerc@itam.cas.cz
000015240 8564_ $$s98061$$uhttps://invenio.itam.cas.cz/record/15240/files/TS.SM06-1.06.pdf$$yOriginal version of the author's contribution as presented on CD,  page 2154, code TS.SM06-1.06
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000015240 962__ $$r13812
000015240 980__ $$aPAPER