TY - GEN
T1 - COMBINED CONCENTRATION AND TEMPERATURE-INDUCED MARANGONI CONVECTION IN A BINARY MIXTURE
AU - Suzuki, Yuji
AU - Noguchi, Suguru
AU - Longtin, Jon P.
AU - Hijikata, Kunio
N1 - Publisher Copyright:
© 1996 American Society of Mechanical Engineers (ASME). All rights reserved.
PY - 1996
Y1 - 1996
N2 - In binary and multi-component mixtures, surface-tension-driven flow, i.e., Marangoni convection, can arise from both concentration and temperature gradients at the liquid surface. Depending on the liquids, concentration effects can complement or oppose temperature effects, which is important for many areas of engineering interest, e.g., mixing, solidification, evaporation, and drying. This work experimentally investigates combined temperature and concentration-induced Marangoni convection for an ethanol-water binary mixture in an enclosed cell with heated and cooled walls. Velocity profiles are obtained using a photochromic dye technique, and concentration variation at the liquid surface is measured using an interferometric technique. The results indicate that concentration effects dominate at 50/50 and 80/20 ethanol-water volume percent mixtures, resulting in a large surface velocity in the opposite direction to the bulk flow. Concentration effects can be arrested by exposing the free liquid surface to non-condensable gas at atmospheric pressure.
AB - In binary and multi-component mixtures, surface-tension-driven flow, i.e., Marangoni convection, can arise from both concentration and temperature gradients at the liquid surface. Depending on the liquids, concentration effects can complement or oppose temperature effects, which is important for many areas of engineering interest, e.g., mixing, solidification, evaporation, and drying. This work experimentally investigates combined temperature and concentration-induced Marangoni convection for an ethanol-water binary mixture in an enclosed cell with heated and cooled walls. Velocity profiles are obtained using a photochromic dye technique, and concentration variation at the liquid surface is measured using an interferometric technique. The results indicate that concentration effects dominate at 50/50 and 80/20 ethanol-water volume percent mixtures, resulting in a large surface velocity in the opposite direction to the bulk flow. Concentration effects can be arrested by exposing the free liquid surface to non-condensable gas at atmospheric pressure.
UR - https://www.scopus.com/pages/publications/85169806323
U2 - 10.1115/IMECE1996-0096
DO - 10.1115/IMECE1996-0096
M3 - Conference contribution
AN - SCOPUS:85169806323
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
SP - 77
EP - 83
BT - Heat Transfer
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 1996 International Mechanical Engineering Congress and Exposition, IMECE 1996
Y2 - 17 November 1996 through 22 November 1996
ER -