000013913 001__ 13913
000013913 005__ 20161115094005.0
000013913 04107 $$aeng
000013913 046__ $$k2016-08-21
000013913 100__ $$aBhowmick, Aklant
000013913 24500 $$aEffect of pressure fluctuations on Richtmyer Meshkov coherent structure

000013913 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000013913 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000013913 506__ $$arestricted
000013913 520__ $$2eng$$aWe consider the effect of pressure fluctuations on the evolution of Richtmyer-Meshkov (RM) flows. The pressure fluctuations are induced by non-uniformities in the fluid bulk and are modeled as a time dependent acceleration with the power-law exponent (-2). We consider a large scale periodic coherent structure of bubbles and spikes in a two-dimensional RM flow, and obtain asymptotic solutions describing nonlinear dynamics of the structure using group theory analysis. We show that regular asymptotic solutions describing the bubble dynamics form a one-dimensional family. The family can be parametrized by the curvature of the bubble front. The stability of the family solutions is analyzed. The physically significant solution in the family is interpreted as the stable solution with the maximum velocity. The associated flow fields in the vicinity of the bubble tip indicate the formation of vortices and the presence of shear at the interface, which may lead to cascading of energy to smaller scales.

000013913 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013913 653__ $$a

000013913 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000013913 720__ $$aBhowmick, Aklant
000013913 8560_ $$ffischerc@itam.cas.cz
000013913 8564_ $$s152385$$uhttps://invenio.itam.cas.cz/record/13913/files/PO.FM07-1.05.121.pdf$$yOriginal version of the author's contribution as presented on CD, XMLout( page 995, code PO.FM07-1.05.121).
000013913 962__ $$r13812
000013913 980__ $$aPAPER