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Showing 1 to 20 of 28 for “"Water film"”.
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Atomization From a Flowing Horizontal Water Film by a Parallel Air Flow
Made available in DSpace on 2014-12-08T23:18:23Z (GMT). No. of bitstreams: 1 6812224.pdf: 6281369 bytes, checksum: 4c54405d6a5e1d43206e64737b0d2550 (MD5) Previous issue date: 1968
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The determination of a water film coefficient and a condensing steam film coefficient for a single tube heat exchanger
The object of this thesis was to determine water film coefficients and condensing steam film coefficients for a single tube heat exchanger. A shell and tube apparatus was constructed and these coefficients were determined by Wilsons graphical method. Test runs were made at various pressures and …
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A Numerical Approach for Oil Slug Mobilization in a Capillary Tube Under Absence and Presence of External Excitations
… drop, also known as a \slug", via the aid of a water film. This differs from other work in this area wherein the oil drop is forced through the throat of a pore using external excitations. In the first simulation, an oil drop is placed in a small diameter tube filled with water and then flushed …
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Heat transfer and scale resisting properties of silicone resins
… of silicone coated heat-exchanger tubes on the water film coefficient of heat transfer and on the formation of gypsum seals were studied. The heat-exchanger tubes consisted of 74 ½-in. sections of 1-in. Nominal diameter standard iron pipe into whose surface were installed six copper-constantan …
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Molecular Structure and Thermodynamics of CO<sub>2</sub> and Water Adsorption on Mica
The adsorption of CO2 and water on clay surfaces plays a key role in applications such as gas storage in saline aquifers and depleted hydrocarbon reservoirs but is not yet fully understood. Here, the adsorption of CO2 and water vapor is studied using Grand Canonical Monte Carlo and molecular …
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Adsorption and photochemical transformation of polycyclic aromatic hydrocarbons on atmospheric water films
Atmospheric water films affect the processing of chemicals in the atmosphere and have potential effects on human health and the environment. In this work, adsorption and photochemical transformations of gas-phase PAHs were studied in a flow-tube photo-reactor with a view to understanding the …
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A machine learning study of wind-driven runback/flow-off multiphase flows pertinent to aircraft icing phenomena
… unsteady runback behavior of wind-driven runback water film (WDRWF) flows over aircraft surfaces has a significant impact on the aircraft in-flight icing process. Conventional theoretical/numerical methods cannot accurately predict WDRWF flow due to the limited comprehension of the intricate …
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Evaluation of film, jacket and internal cooling during fermentation of grape juice
… with analytical and experimental aspects of water-film cooling, jacket cooling and internal cooling, which are the three predominant types of fermentation cooling found in the South African wine industry. During the past decades questions were constantly raised concerning the thermal …
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Study of micro-sized particle deposition using DEM, CFD-DEM and SPH approach
… the multiphase system. In the simulation liquid water film evaporates and leaves the particles at the container alone. Interesting patterns are seen to emerge as the liquid water film evaporates. The resulting packing structure analyzed in terms of the range of coordination number and radial …
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Investigation of a contact resonance atomic force microscopy scan speed phenomenon
… AFM phenomenon and applies a squeeze film hydrodynamic lubrication model to explain it. Contact-resonance spectroscopy is used to investigate the phenomenon in which, above a critical scan speed, there is a monotonic decrease in the measured contact-resonance frequency with increasing …
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Evaporation of liquids from structured and non-structured mixtures
… vapour pressures ranging from 0.1 to 500 Torr, water contained in silica particles, alkane/squalane mixtures, hexane gelled with silica particles, surfactant/water mixtures, immiscible layered liquid mixtures and emulsions have been determined. For pure liquids and simple unstructured liquid …
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Experimental Characterization and Modeling of Tire-Ice Interface
… model are used to calculate the height of the water film created by the heat generated due to the friction force. Next, the viscous friction coefficient at the contact patch is obtained. By using the thermal balance equation at the contact patch, dry friction is obtained. Knowing the friction …
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Comparative Study of the Effect of Tread Rubber Compound on Tire Performance on Ice
… contact for estimation of temperature rise and water film height was performed using ATIIM 2.0. The performance of this in-house model was compared against three classical tire-ice friction models. A parametrization of the Magic Formula tire model was performed using experimental data and a …
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Air entrainment in vertical dropshafts
… air entrainment in vertical dropshafts conveying water from a high level to a lower level. The study initially commenced with hydraulic tests on scale models of a vortex-entry dropshaft arrangement. This subsequently expanded into a more detailed analysis of the mechanisms involved in the air …
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Mobilization and Flow of Multiple Oil Slugs in Water Saturated Capillary Models
… (MOS) inside capillary models saturated with water, attempting to understand the mechanism on how single oil slug (SOS) and MOS inside the capillary models are mobilized and stabilized inflow under static external pressure. The mobilization and stabilization pressures required for MOS in the …
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Measuring The Nanomechanics Of Nanoconfined Water Layers
<p>Nanoconfined water has been the subject of special interest due to its applications in various fields such as biology, geology, medicine, and engineering tribology. While there is a general agreement on the layering of water molecules along atomically smooth surfaces, the behavior and properties …
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Hydrophobic Forces in Wetting Films
… adhesion is possible only when the thin film of water between the bubble and particle ruptures, just like when two colloidal particles or air bubbles adhere with each other. Under most flotation conditions, however, both the double-layer and dispersion forces are repulsive, which makes it …
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Experimental and Modeling of Pneumatic Tire Performance on Ice
… model is now capable of simulating the thin water film created from the melted ice, the prediction of tractive performance, the estimation of the viscous friction due to the water layer, and the influence of braking operations including the locked wheel condition. Experimental studies, …
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Studies of Thin Liquid Films Confined between Hydrophobic Surfaces
… gold surfaces showed a decrease in excess film entropy (£GSf), suggesting that hydrophobic force originates from changes in the structure of the medium (water) confined between hydrophobic surfaces. As a follow-up to the previous study, surface force measurements have been conducted using …
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Heat transfer coefficients between condensing organic vapors and a vertical copper tube
… foot copper tube placed in a vertical position. Water velocities through the tube were varied from 0.18 to 1.38 feet per second. Mass velocities of from 4 to 50 pounds per hour of' vapor were condensed on the tube. The copper tube employed was of 18-gauge metal and 7/8-inch in outside diameter. …
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