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29 March 2024
 
  » arxiv » nlin.PS/0505028

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Traveling Wave Fronts and Localized Traveling Wave Convection in Binary Fluid Mixtures
D. Jung ; M. Luecke ;
Date 11 May 2005
Subject Pattern Formation and Solitons | nlin.PS
AbstractNonlinear fronts between spatially extended traveling wave convection (TW) and quiescent fluid and spatially localized traveling waves (LTWs) are investigated in quantitative detail in the bistable regime of binary fluid mixtures heated from below. A finite-difference method is used to solve the full hydrodynamic field equations in a vertical cross section of the layer perpendicular to the convection roll axes. Results are presented for ethanol-water parameters with several strongly negative separation ratios where TW solutions bifurcate subcritically. Fronts and LTWs are compared with each other and similarities and differences are elucidated. Phase propagation out of the quiescent fluid into the convective structure entails a unique selection of the latter while fronts and interfaces where the phase moves into the quiescent state behave differently. Interpretations of various experimental observations are suggested.
Source arXiv, nlin.PS/0505028
Other source [GID 479119] pmid16196711
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