Surface Tension of Supercooled Water: Inflection Point-Free Course down to 250 K Confirmed Using a Horizontal Capillary Tube

2017 ◽  
Vol 62 (11) ◽  
pp. 3823-3832 ◽  
Author(s):  
Václav Vinš ◽  
Jan Hošek ◽  
Jiří Hykl ◽  
Jan Hrubý
Keyword(s):  
Surface Tension ◽  
Inflection Point ◽  
Capillary Tube ◽  
Supercooled Water

Surface Tension of Supercooled Water: No Inflection Point down to −25 °C

2014 ◽  
Vol 5 (3) ◽  
pp. 425-428 ◽  
Author(s):  
Jan Hrubý ◽  
Václav Vinš ◽  
Radim Mareš ◽  
Jiří Hykl ◽  
Jana Kalová
Keyword(s):  
Surface Tension ◽  
Inflection Point ◽  
Supercooled Water

Second inflection point of water surface tension in the deeply supercooled regime revealed by entropy anomaly and surface structure using molecular dynamics simulations

2019 ◽  
Vol 21 (6) ◽  
pp. 3360-3369 ◽  
Author(s):  
Xiaoxiang Wang ◽  
Kurt Binder ◽  
Chuchu Chen ◽  
Thomas Koop ◽  
Ulrich Pöschl ◽  
...  
Keyword(s):  
Physical Chemistry ◽  
Molecular Dynamics ◽  
Surface Tension ◽  
Molecular Dynamics Simulations ◽  
Surface Structure ◽  
Water Surface ◽  
Inflection Point ◽  
Supercooled Water ◽  
Atmospheric Sciences ◽  
Dynamics Simulations

The surface tension of supercooled water is of fundamental importance in physical chemistry and materials and atmospheric sciences.

Possible Anomaly in the Surface Tension of Supercooled Water: New Experiments at Extreme Supercooling down to −31.4 °C

2020 ◽  
Vol 11 (11) ◽  
pp. 4443-4447 ◽  
Author(s):  
Václav Vinš ◽  
Jiří Hykl ◽  
Jan Hrubý ◽  
Aleš Blahut ◽  
David Celný ◽  
...  
Keyword(s):  
Surface Tension ◽  
Supercooled Water

scholarly journals Surface tension of supercooled water nanodroplets from computer simulations

2019 ◽  
Vol 150 (23) ◽  
pp. 234507 ◽  
Author(s):  
Shahrazad M. A. Malek ◽  
Peter H. Poole ◽  
Ivan Saika-Voivod
Keyword(s):  
Surface Tension ◽  
Computer Simulations ◽  
Supercooled Water

Second inflection point of water surface tension

2006 ◽  
Vol 89 (16) ◽  
pp. 164106 ◽  
Author(s):  
Y. J. Lü ◽  
B. Wei
Keyword(s):  
Surface Tension ◽  
Water Surface ◽  
Inflection Point

scholarly journals Effects of Tube Radius and Surface Tension on Capillary Rise Dynamics of Water/Butanol Mixtures

2021 ◽  
Vol 11 (8) ◽  
pp. 3533
Author(s):  
Seungyeop Baek ◽  
Sungjin Jeong ◽  
Jaedeok Seo ◽  
Sanggon Lee ◽  
Seunghwan Park ◽  
...  
Keyword(s):  
Surface Tension ◽  
High Performance ◽  
Liquid Surface ◽  
Capillary Tube ◽  
Capillary Rise ◽  
Heat Pipes ◽  
Water Mixture ◽  
Tube Radius ◽  
Liquid Surface Tension ◽  
Linear Correlations

Capillary-driven action is an important phenomenon which aids the development of high-performance heat transfer devices, such as microscale heat pipes. This study examines the capillary rise dynamics of n-butanol/water mixture in a single vertical capillary tube with different radii (0.4, 0.6, and 0.85 mm). For liquids, distilled water, n-butanol, and their blends with varying concentrations of butanol (0.3, 0.5, and 0.7 wt.%) were used. The results show that the height and velocity of the capillary rise were dependent on the tube radius and liquid surface tension. The larger the radius and the higher the surface tension, the lower was the equilibrium height (he) and the velocity of rise. The process of capillary rise was segregated into three characteristic regions: purely inertial, inertial + viscous, and purely viscous regions. The early stages (purely inertial and inertial + viscous) represented the characteristic heights h1 and h2, which were dominant in the capillary rise process. There were linear correlations between the characteristic heights (h1, h2, and he), tube radius, and surface tension. Based on these correlations, a linear function was established between each of the three characteristic heights and the consolidated value of tube radius and surface tension (σL/2πr2).

Computational Modeling of Adiabatic Bubble Growth Dynamics From Submerged Capillary-Tube Orifices in Aqueous Solutions of Surfactants

2019 ◽  
Vol 141 (5) ◽  
Author(s):  
Sanjivan Manoharan ◽  
Anirudh M. Deodhar ◽  
Raj M. Manglik ◽  
Milind A. Jog
Keyword(s):  
Surface Tension ◽  
Interfacial Tension ◽  
Capillary Tube ◽  
Pure Water ◽  
Growth Dynamics ◽  
Interface Region ◽  
Pure Liquid ◽  
Flow Rates ◽  
Air Interface ◽  
Adsorption Desorption

The growth dynamics of isolated gas bubbles from a submerged capillary-tube orifice in a pool of an aqueous surfactant (sodium dodecyl sulfate or SDS) solution is computationally investigated. The governing equations for surfactant mass transport in the bulk liquid and interfacial adsorption–desorption are solved simultaneously with the Navier–Stokes equations, employing the volume-of-fluid (VOF) technique to track the deforming liquid–air interface. The VOF method tends to spread the liquid–air interface over two to three computational cells, creating an interface region with finite thickness. A new numerical treatment is developed to determine the surfactant transport and adsorption/desorption in the interface region. From the variation of the surfactant interfacial concentration, the spatio-temporal variation in interfacial tension is determined and the shape of the growing bubble is predicted. To validate the numerical model, experimental measurements of bubble shape and size are carried out using high speed videography. Because of the decrease in surface tension with surface age, bubble departure diameters in SDS–water solutions are smaller than those obtained in pure water, and they are a function of bubble frequency. At higher air-flow rates (smaller surface age), the bubble departure diameters tend toward those in pure water, whereas at low flow rates (larger surface age), they are significantly smaller than those in water and are closer in size to those in a pure liquid having surface tension equal to the equilibrium value in SDS solution. Furthermore, the nonuniform surfactant adsorption–desorption at the evolving interface results in variation in interfacial tension around the bubbles, and thus their shapes in surfactant solution are different from those in a pure liquid.

Submerged Gas Injection in Microgravity

2002 ◽  
Author(s):  
J. Carrera ◽  
R. N. Parthasarathy ◽  
S. R. Gollahalli
Keyword(s):  
Surface Tension ◽  
Weber Number ◽  
Gas Flow ◽  
Capillary Tube ◽  
Bubble Formation ◽  
Gas Injection ◽  
Flow Regimes ◽  
Flowing Liquid ◽  
Flow Rates ◽  
Reduced Surface

The effects of buoyancy on the flow regimes of submerged gas injection were studied in this investigation. A capillary tube submerged in water was used for gas injection in microgravity and terrestrial conditions, and the resulting flow regimes and bubble sizes were documented. The effects of liquid co-flow and reduced surface tension were also analyzed. Under reduced gravity, three flow regimes were observed over the range of conditions tested. At low gas flow rates, the bubbles did not detach from the injector, forming an interconnected bubble cluster that adhered to the injector. Single bubbles started detaching and moving away from the injector when the Weber number reached a value around 3. At gas flow rates corresponding to a Weber number value of 10, the bubble coalescence regime was observed near the injector. It was found that the absence of buoyancy prevented the formation of the jetting regime. For all gas throughputs, the co-flowing liquid aided the detachment of the bubbles, resulting in the generation of more uniform bubbles than in quiescent liquids. The presence of co-flow resulted in a smaller bubble size accompanied by an increased frequency of bubble formation. Reduced surface tension produced a similar effect, resulting in smaller bubbles.

Sign in / Sign up

Export Citation Format

Share Document