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Determination of interfacial tension at high temperatures. Surface tension of potassium and interfacial tension of Li/LiCl to 850$sup 0$C

Description: A modified maximum bubble pressure apparatus suitable for high- temperature determination of interfacial tension in a closed vessel was devised. It employs two capillaries of different diameters running downwards from the bottom of an upper pool to the same depth in a lower pool. A conical plug that can close off the larger tube permits utiiization of either capillary at will. Simulteneous solution of Schroedinger's equation with the two maximum bubble pressure values yields the surface or inte… more
Date: January 1, 1973
Creator: Chung, J.W. & Bonilla, C.F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Interfacial Tension Measurement on A1(NO₃)₃ - H₂O - HNO₃ - Dibutyl Cellosolve System

Description: This report discusses two methods used for experimental determination of the interfacial tension of an immisible aqueous-organic system where the density of the organic phase is less than that of the aqueous phase. The methods discussed are the falling drop method and the Donnan modification/rising drop method.
Date: January 28, 1947
Creator: Turk, E. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental Values of the Surface Tension of Supercooled Water

Description: "The results of surface-tension measurements for supercooled water are presented. A total of 702 individual measurements of surface tension of triple-distilled water were made in the temperature range, 27 to -22.2 C, with 404 of these measurements at temperatures below 0 C. The increase in magnitude of surface tension with decreasing temperature, as indicated by measurements above 0 C, continues to -22.2 C. The inflection point in the surface-tension - temperature relation in the vicinity of 0 … more
Date: October 1951
Creator: Hacker, Paul T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental Techniques for Determining Surface Energies of Solid Metals- A Literature Survey

Description: A knowledge of the surface tension of metals is a valuable tool in many aspects of physical metallurgy. Surface tension is a prime factor in such phenomena as swelling, nucleation and growth, and corrosion by liquid metals, and is also of importance in brazing. casting, and sintering. This survey was initiated to facilitate the selection of an experimental technique for determining the surface tension of uranium in support of current swelling studies of irradiated uranium. It is believed that s… more
Date: January 12, 1959
Creator: Laidler, J. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Variation With Temperature of Surface Tension of Lubricating Oils

Description: Note presenting surface-tension measurements from room temperature to 180 degrees Celsius of a series of aeronautical lubricating oils and a few liquids of associated interest. The critical temperatures of the liquids are calculated and a general classification of existing oils into three groups is provided.
Date: February 1950
Creator: Ross, Sydney
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A discontinuous Galerkin front tracking method for two-phase flows with surface tension

Description: A Discontinuous Galerkin method for solving hyperbolic systems of conservation laws involving interfaces is presented. The interfaces are represented by a collection of element boundaries and their position is updated using an arbitrary Lagrangian-Eulerian method. The motion of the interfaces and the numerical fluxes are obtained by solving a Riemann problem. As the interface is propagated, a simple and effective remeshing technique based on distance functions regenerates the grid to preserve i… more
Date: December 28, 2008
Creator: Nguyen, V. T.; Peraire, J.; Cheong, K. B. & Persson, P. O.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Surface Tension Estimates for Droplet Formation in Slurries with Low Concentrations of Hydrophobic Particles, Polymer Flocculants or Surface-Active Contaminants

Description: In support of the K-Basin project, Pacific Northwest National Laboratory (PNNL) was requested to evaluate the appropriate surface tension value to use in models predicting the formation of droplets from spray leaks of K-Basin slurries. The specific issue was whether it was more appropriate to use the surface tension of pure water in model predictions for all plausible spray leaks or to use a lower value. The surface tension of K-Basin slurries is potentially affected not only by particles but b… more
Date: June 10, 2011
Creator: Gauglitz, Phillip A.; Mahoney, Lenna A.; Blanchard, Jeremy & Bamberger, Judith A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Boiling Points and Surface Tensions of Mixtures of Benzyl Acetate With Dioxan, Aniline and Meta-Cresol

Description: Technical report. From Abstract : "Accurate measurements on boiling points and surface tensions of mixtures of benzyl acetate with dioxan, aniline and meta-cresol over the entire range of concentration are reported. The results have been analysed in terms of quasi-crystalline model which is partially successful in representing the composition dependence of heats of mixing, boiling points and surface tension except for composition dependence of boiling points of benzyl acetate and meta-cresol."
Date: September 13, 1962
Creator: Katti, P. K. & Chaudhri, M. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Estimating the Maximum Splat Diameter of a Solidifying Droplet

Description: We present a simple analytical model for the estimation of the maximum splat diameter of an impacting droplet on a subcooled target. This work is an extension of the isothermal model of Pasandideh-Fard et al. (1996). The model uses an energy conservation argument, applied between the initial and final drop configurations, to approximately capture the dynamics of spreading. The effects of viscous dissipation, surface tension, and contact angle are taken into account. Tests against limited experi… more
Date: March 31, 1999
Creator: Hadjiconstantinou, N.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Dynamics of Bubbles Rising in Finite and Infinite Media

Description: The dynamic behavior of single bubbles rising in quiescent liquid Suva (R134a) in a duct has been examined through the use of a high speed video system. Size, shape and velocity measurements obtained with the video system reveal a wide variety of characteristics for the bubbles as they rise in both finite and infinite media. This data, coupled with previously published data for other working fluids, has been used to assess and extend a rise velocity model given by Fan and Tsuchiya. As a result … more
Date: October 27, 2000
Creator: Maneri, C. C. & Vassallo, P. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A new method for measuring the dynamic surface tension of complex-mixture liquid drops

Description: A simple and accurate technique has been developed for measuring dynamic surface tension. The new technique is based on growing a drop at the end of a fine capillary into another immiscible fluid and can follow the changes in tension at a freshly formed interface during its entire period of evolution. When the relative importance of the surface tension force is large compared to gravitational and viscous forces, shapes of growing drops are sections of spheres and the difference in pressure betw… more
Date: June 29, 1994
Creator: Zhang, X.; Harris, M. T. & Basaran, O. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Density functional theory of simple polymers in a slit pore: 3. Surface tension

Description: In a previous study of tangent site chains near a surface, the inhomogeneous density profiles were found through Density Functional theory. In the current study, the surface tensions of these systems are found from the results of the previous study through a thermodynamic integration. The calculated surface tensions are then compared to those found directly through computer simulation. Both the surface tension and surface excess for polymeric systems are shown to qualitatively differ from those… more
Date: April 4, 2000
Creator: HOOPER,JUSTIN B.; MCCOY,JOHN D.; CURRO,JOHN G. & VAN SWOL,FRANK B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Fabrication and Characterization of Suspended Carbon Nanotube Devices in Liquid

Description: Suspended carbon nanotube devices are a promising platform for future bio-electronic applications. Suspended carbon nanotube transistors have been previously fabricated in air; however all previous attempts to bring them into liquid failed. We analyze forces acting on the suspended nanotube devices during immersion into liquids and during device operation and show that surface tension forces acting on the suspended nanotubes during transfer into the liquid phase are responsible for the nanotube… more
Date: October 30, 2006
Creator: Artyukhin, A.; Stadermann, M.; Stroeve, P.; Bakajin, O. & Noy, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Two-phase viscoelastic jetting

Description: A coupled finite difference algorithm on rectangular grids is developed for viscoelastic ink ejection simulations. The ink is modeled by the Oldroyd-B viscoelastic fluid model. The coupled algorithm seamlessly incorporates several things: (1) a coupled level set-projection method for incompressible immiscible two-phase fluid flows; (2) a higher-order Godunov type algorithm for the convection terms in the momentum and level set equations; (3) a simple first-order upwind algorithm for the convect… more
Date: December 10, 2008
Creator: Yu, J.-D.; Sakai, S. & Sethian, J. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Flow of a two-dimensional liquid metal jet in a strong magnetic field.

Description: A combined effect of surface tension, gravity, inertia and a transverse nonuniform magnetic field on the steady, two-dimensional jet (or curtain) flow is studied with reference to liquid metal divertors of tokamaks [1] and coating flows [2]. Here main fundamental aspects of the flow are presented. More details on the assumptions, analysis and results are given in [3].
Date: August 1, 2002
Creator: Reed, C. B. & Molokov, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Laser beam welding of AZ31B-H24 magnesium alloy.

Description: The laser beam weldability of AZ31B magnesium alloy was examined with high power CW CO{sub 2} and pulsed Nd:YAG lasers. The low viscosity and surface tension of the melt pool make magnesium more difficult to weld than steel. Welding parameters necessary to obtain good welds were determined for both CW CO{sub 2} and pulsed Nd:YAG lasers. The weldability of the magnesium alloy was significantly better with the Nd:YAG laser. The cause of this improvement was attributed to the higher absorption of … more
Date: September 29, 1998
Creator: Leong, K. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Foaming characteristics of refigerant/lubricant mixtures

Description: The air-conditioning and refrigeration industry has moved to HFC refrigerants which have zero ozone depletion and low global warming potential due to regulations on CFC and HCFC refrigerants and concerns for the environment. The change in refrigerants has prompted the switch from mineral oil and alkylbenzene lubricants to polyolester-based lubricants. This change has also brought about a desire for lubricant, refrigerant and compressor manufacturers to understand the foaming properties of alter… more
Date: April 1, 1997
Creator: Goswami, D.Y.; Shah, D.O.; Jotshi, C.K.; Bhagwat, S.; Leung, M. & Gregory, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Investigation of oil recovery improvement by coupling an interfacial tension agent and a mobility control agent in light oil reservoirs. Annual report, October 1992--September 1993

Description: Investigation of Oil Recovery Improvement by Coupling and Interfacial Tension Agent and a Mobility Control Agent in Light Oil Reservoirs will study two major areas concerning co-injecting an interfacial tension reduction agent(s) and a mobility control agent. The first area defines the interactions of alkaline agent, surfactants, and polymers on a fluid-fluid and fluid-rock basis. The second area concerns the economic improvement of the combined technology. This report examines the interactions… more
Date: June 1, 1994
Creator: Pitts, M. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Equilibrium fluid interface behavior under low- and zero-gravity conditions. II

Description: We describe here recent mathematical results that form the basis of our forthcoming space experiment, developed jointly with Mark Weislogel of NASA Lewis Research Center, which is scheduled for the Glovebox on the Mir 23 / NASA 4 Mission in December 1996. The mathematical basis for the Angular Liquid Bridge is described. The anticipated liquid behavior used in the apparatus is illustrated.
Date: May 1, 1996
Creator: Concus, P. & Finn, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Dynamical modeling of surface tension

Description: In a recent review it is said that free-surface flows ``represent some of the difficult remaining challenges in computational fluid dynamics``. There has been progress with the development of new approaches to treating interfaces, such as the level-set method and the improvement of older methods such as the VOF method. A common theme of many of the new developments has been the regularization of discontinuities at the interface. One example of this approach is the continuum surface force (CSF) … more
Date: August 1, 1996
Creator: Brackbill, J.U. & Kothe, D.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Equilibrium liquid free-surface configurations: Mathematical theory and space experiments

Description: Small changes in container shape or in contact angle can give rise to large shifts of liquid in a microgravity environment. We describe some of our mathematical results that predict such behavior and that form the basis for physical experiments in space. The results include cases of discontinuous dependence on data and symmetry-breaking type of behavior. 23 refs., 9 figs.
Date: June 1, 1996
Creator: Concus, P. & Finn, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of high-efficiency gas-liquid contactors for natural gas processing. Semi-annual report, April--September 1995

Description: The objective of this proposed program is to ensure reliable supply of high-quality natural gas by reducing the cost of treating subquality natural gas containing H{sub 2}O, CO{sub 2}, H{sub 2}S and/or trace quantities of other gaseous impurities by applying high-efficiency rotating and structured packing gas liquid contactors. Work accomplished during this reporting period are discussed for the following tasks: Task 2, field experimental site seletion; Task 3, field experimental skid unit desi… more
Date: November 1, 1995
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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