Wine tears

Estimate the interfacial tension gradient formed in alcohol-water mixtures as a function of alcohol content. Determine the minimum alcohol content necessary to form wine tears on a vertical glass wall [174] (experimental veriflcation is possible). 

FIGURE 6.13. The Marangoni effect results from the presence of surface tension gradients in a liquid surface (a) the presence of a hot spot will lower the surface tension near the heated area, causing flow in the direction of the cooler (higher surface tension) areas (b) if a volatile surface-active material evaporates from a liquid surface, the local surface tension will increase resulting in flow toward the depleted area and the formation of a bump or drop as in wine tears. ... 

Fig. 1.33. Manifestation of the Marangoni effect. Wine tears (Cazabat, A.M.)...

A familiar (and biblical [SO]) example is the formation of tears of wine in a glass. Here, the evaporation of the alcohol from the meniscus leads to a local raising of the surface tension, which, in turn, induces a surface and accompanying bulk flow upward. 

Tears-of-Wine The surface motion of mixed liquids was described in ancient times [29], and scientifically in a paper by James Thompson, the brother of Lord Kelvin [30] in 1855. Recently Neogi [31], and Cazabat [32] reported on the formation of ordered stmctures in evaporating solutions of two liquids. The meniscus of wine in a glass is drawn upward on the glass surface and forms a thin film. Due to its... 

Neogi, P. (1985) Tears-of-wine and related phenomena. J. Colloid. Interface Sci., 105, 94-101. 

So when we were married, we did no more than drink wine and eat sweet cakes, there in the antechamber of the chapel my mother, Margaret—told only that morning lest she chatter—a priest sworn to silence, a boy server brought to cense and sing and, in the corner, Mai, with tears in her eyes. 

Ordinary, everyday matter as we find it in trees and stones, flowers and streams, blood and tears, wine and butterflies, should indeed be qualified as precious, luminous and heavenly, for it is rare and photosensitive and has celestial origins. 

Are you ready for the answer Here is the list of terms sorted in order of beauty as determined by my little survey of scientists and colleagues. The numbers in parentheses indicate the number of times the term was an individual s first choice dancing flames (31), snow crystal (20), mist-covered swamp (17), spiral nautilus shell (10), mossy cavern (5), kaleidoscope image (5), avalanche (4), computer chip (3), seagull s cry (3), tears on a little girl (3), trilobite fossil (2), glimmer of mercury (2), wine (2), asphalt (1). 

Often a typical shape of wine on the rim of a wine glass is observed, called tears of wine [51,52], To understand this phenomenon we take wine as a mixture of water and ethanol. A wine drop is thicker at the bottom than at the top because of its weight (Fig. 3.8). Part of the liquid evaporates. Due to its lower vapor pressure ethanol evaporates faster than water. The rate of evaporation is roughly proportional to the surface area. Since the drop is thinner at the... 

The user under the influence of a psychedelic can function normally and can also alter the experience. This should be fully grasped before taking this type of drug. Once into a session, the user should take time out and practice "reversing sensations. Water may taste like wine just by thinking it a light object can be made to feel heavy or another s glistening tears can be turned into a dry-eyed expression of joy. When sufficiently skilled, the user will be able to "select hallucinations at wilL... 

Tail s compressibility formula, 66, 68 Tammann s internal pressure theory, 70 tangent to plane curve, 245 tangent plane to conicoid, 432 Tate s drop-weight law, 182, tears of strong wine, 137 Telang s viscosity formula, 91 tensi-eudiometer, 232 tensile strength of liquid, 203 tensimeter, 232 hypsometer, 234 tension tube, 277... 

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