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Volume of fluid method

About: Volume of fluid method is a research topic. Over the lifetime, 5338 publications have been published within this topic receiving 116760 citations.


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Journal ArticleDOI
TL;DR: In this article, a 3D parallel and Cartesian level set (LS) method coupled with a volume of fluid (VOF) method is implemented into the commercial CFD code FLUENT for modeling the gas-liquid interface in bubbly flow.
Abstract: This paper describes the implementation of a 3D parallel and Cartesian level set (LS) method coupled with a volume of fluid (VOF) method into the commercial CFD code FLUENT for modeling the gas-liquid interface in bubbly flow. Both level set and volume of fluid methods belong to the so called "one" fluid methods, where a single set of conservation equations is solved and the interface is captured via a scalar function. Since both LS and VOF have advantages and disadvantages, our aim is to couple these two methods to obtain a method, which is superior to both standalone LS and VOF and verify it versus a selection of test cases. VOF is already available in FLUENT, so we implemented an LS method into FLUENT via user defined functions. The level set function is used to compute the surface tension contribution to the momentum equations, via curvature and its normal to the interface, using the Brackbill method while the volume of fluid function is used to capture the interface itself. A re-initialization equation is implemented and solved at every time step using a fifth-order weighted essentially nonoscillatory scheme for the spatial derivative, and a first-order Euler method for time integration. The coupling effect is introduced by solving at the end of each time step an equation, which connects the volume fractions with the level set function. The verification of parasitic currents and interfacial deformation due to numerical error is assessed in comparison to original VOF scheme. Validation is presented for free rising bubbles of different diameters for Morton numbers ranging from 10(2) to 10(-11). [DOI: 10.1115/1.4002166]

33 citations

Patent
21 Jun 1957
TL;DR: In this paper, the authors describe a method of applying a substance to a moving sheet of textile material, paper, filament, or assemblage of filaments, and wherein the amount of fluid taken up by the material varies with the nature of the material, the properties of the fluid &c.
Abstract: 654,178. Coating webs. BRITISH COTTON INDUSTRY RESEARCH ASSOCIATION. Dec. 30, 1947, No. 34554. [Class 140] In a method of applying a substance to a moving sheet of textile material, paper, filament, or assemblage of filaments, &c. wherein the substance applied is a neat fluid or a solid or liquid dissolved, dispersed or emulsified in a liquid phase to obtain a fluid, and wherein the amount of fluid taken up by the material varies with the nature of the material, the properties of the fluid &c. the fluid is applied to the material from a reservoir and any change in weight of fluid in the reservoir resulting from a variation in the rate of application is utilized to alter some property of the fluid in the reservoir so as to correct said deviation. The change of weight of the fluid in the reservoir may be detected directly, or indirectly as by change of volume, depth or pressure, and the property of the fluid which is altered thereby may be its viscosity varied by temperature control or its concentration varied by adding a diluent. A web of warps 4b, Fig. 1, passes around rollers 4a, 17 in a sizing reservoir 3. Size of predetermined concentration is fed from a storage vessel 1 to the reservoir 3 by a metering pump 2 at a rate proportional to the speed of the web. The pump 2 is driven from the shaft 4 of roller 4a through a mechanism including adjustable gear boxes 9 and 10 which may be calibrated in the percentages of solids required on the warp. A diluent is pumped to the reservoir from a vessel 20 by a pump 21 driven by a motor 22. A floating roller 11 in the reservoir 3 is connected to a pivoted lever 12 and a diminution of volume of fluid in the reservoir causes the lever 12 to close a contact 15 to operate the pump motor 22 to supply diluent to the reservoir. The diluent and stock size enter the reservoir through adjacent horizontal pipes 19 and 18 respectively and are mixed by the agitation caused by the roller 4a. A baffle 23 prevents unmixed size and diluent being taken up by the warp. In a modification, Fig. 2, both diluent and size are continuously supplied to the reservoir at a speed proportional to the speed of the web, the diluent being pumped by a variable throw pump 25 driven from the roller shaft 4. In this embodiment the reservoir is supported by a spring 24 and an increase in the weight of the fluid therein depresses the spring, and a rack 26 attached to the reservoir rotates a pinion 28 altering the stroke of the piston in the pump 25 to decrease the amount of diluent supplied. Correspondingly, a decrease in weight causes an increase in the supply of diluent. When compensation is made by altering the viscosity in response to a temperature control, the means for supplying a diluent are omitted or held inoperative. In the Provisional Specification it is stated that the reservoir may contain a steam heating coil and that the applied fluid may be supplied to the reservoir as a powder and solvent separately.

33 citations

Journal ArticleDOI
TL;DR: In this paper, a novel control volume finite element method with adaptive unstructured meshes is employed to study the three-dimensional droplet deposition process in annular two-phase flow.

33 citations

Journal ArticleDOI
TL;DR: In this paper, the influence of surface oxide layer over hot surfaces on the behavior of single droplets impacting the high temperature surfaces using high speed camera was investigated, and the results presented the effects of surface ozone layer, droplet velocity and droplet size and surface superheating on the hot solid-liquid contact wettability time and on the maximum droplet spread diameter.

33 citations

Journal ArticleDOI
TL;DR: A piecewise-linear, volume-of-fluid method for reconstructing and advecting three-dimensional interfaces and contact lines formed by three materials, which preserves the accuracy and mass-conserving property of the Youngs method in volume-tracking three materials.

33 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023315
2022655
2021352
2020345
2019341
2018323