Concentration field in traveling-wave and stationary convection in fluid mixtures

By comparison of measurements of shadowgraph images of convection in ethanol-water mixtures with the results of recent numerical calculations, we study the role of the concentration field in traveling-wave and stationary convection. The results confirm the existence of a large concentration contrast...

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Veröffentlicht in:	Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 1991-06, Vol.43 (12), p.7105-7108
Hauptverfasser:	EATON, K. D, OHLSEN, D. R, YAMAMOTO, S. Y, SURKO, C. M, BARTEN, W, LÜCKE, M, KAMPS, M, KOLODNER, P
Format:	Artikel
Sprache:	eng
Schlagworte:	640410 - Fluid Physics- General Fluid Dynamics ALCOHOLS BINARY MIXTURES CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY CONVECTION CORRELATIONS DISPERSIONS ENERGY TRANSFER ETHANOL Exact sciences and technology FLOW VISUALIZATION Fluid dynamics FLUIDS Fundamental areas of phenomenology (including applications) HEAT TRANSFER HYDROGEN COMPOUNDS HYDROXY COMPOUNDS MASS TRANSFER MIXTURES ORGANIC COMPOUNDS OXYGEN COMPOUNDS Physics QUANTITY RATIO STANDING WAVES TRAVELLING WAVES Turbulent flows, convection, and heat transfer WATER
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Zusammenfassung:	By comparison of measurements of shadowgraph images of convection in ethanol-water mixtures with the results of recent numerical calculations, we study the role of the concentration field in traveling-wave and stationary convection. The results confirm the existence of a large concentration contrast between adjacent traveling-wave convection rolls. This concentration modulation, which decreases as the Rayleigh number is increased and the transition to stationary convection is approached, is fundamental to the translation of the pattern.
ISSN:	1050-2947 1094-1622
DOI:	10.1103/PhysRevA.43.7105