Transition between curved and angular textures in binary fluid convection

Journal Article · Sun Dec 31 23:00:00 EST 1995 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

DOI:https://doi.org/10.1103/PhysRevE.53.570· OSTI ID:277293

La Porta, A; Eaton, K D; Surko, C M ^[1]

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1. Department of Physics, University of California, San Diego, La Jolla, California 92093 (United States)

We report a transition from a curved texture to an angular texture in Rayleigh-B{acute e}nard convection in a mixture of ethanol and water. The transition occurs as the Rayleigh number is reduced from a high value and approaches the traveling-wave branch and is observed at negative values of the separation ratio in fluid mixtures, but not in a pure fluid. We show that this transition may be understood in terms of a generalization of the Swift-Hohenberg free energy functional. A large increase in wave-number rigidity is observed as the traveling-wave transition is approached. {copyright} {ital 1996 The American Physical Society.}

• DOE Contract Number: FG03-90ER14148
• OSTI ID: 277293
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Journal Name: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics Journal Issue: 1 Vol. 53; ISSN PLEEE8; ISSN 1063-651X
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BIFURCATION
BINARY MIXTURES
CONVECTION
ETHANOL
FREE ENERGY
RAYLEIGH-BENARD INSTABILITY
TEXTURE
TRAVELLING WAVES
WATER