Topic
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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01 Sep 1988
TL;DR: In this article, a system for measuring flow of a fluid through a line is presented, where a region (15) of fluid along the line is isolated from pressure effects outside of the region.
Abstract: The present invention provides a system for measuring flow of a fluid through a line. In the system, a region (15) of fluid along the line is isolated from pressure effects outside of the region. A source region (12) contains a measurement gas in communication with the isolated region, such that the source means and the isolated region together define a fixed volume, and such that a change in volume of fluid in the isolated region produces a complementary change in the volume of the source means with a resulting change in the pressure of the measurement gas contained in the source region. Further provided is a reservoir (11) in communication with the source means for containing a known volume of measurement gas, and means (25) for pumping measurement gas from the reservoir. The pressure of the measurement gas in the reservoir and the source region is monitored. This pressure data is then analyzed to determine the volume of fluid in the isolated region.
278 citations
TL;DR: In this article, a numerical simulation of the boiling flow of R141B in a horizontal coiled tube was performed using the VOF multiphase flow model, and the corresponding experiments were conducted to investigate the boiling flows.
273 citations
TL;DR: In this paper, the authors considered the computational problems arising when a linear interface cuts a cube and gave explicit expressions of general use for cubic roots, and the algorithms used to search for solutions.
269 citations
TL;DR: In this article, a spherical drop, placed in a second liquid of the same density, is subjected to shearing between parallel plates, and the subsequent flow is investigated numerically with a volume-of-fluid (VOF) method.
Abstract: A spherical drop, placed in a second liquid of the same density, is subjected to shearing between parallel plates. The subsequent flow is investigated numerically with a volume-of-fluid (VOF) method. The scheme incorporates a semi-implicit Stokes solver to enable computations at low Reynolds number. Our simulations compare well with previous theoretical, numerical, and experimental results. For capillary numbers greater than the critical value, the drop deforms to a dumbbell shape and daughter drops detach via an end-pinching mechanism. The number of daughter drops increases with the capillary number. The breakup can also be initiated by increasing the Reynolds number.
266 citations
15 Aug 2006
TL;DR: Variable contact angle values around the gas-liquid-solid contact-line as well as their dynamic change during the droplet shape deformation process, have allowed estimation of the adhesion force between the liquid droplet and the solid surface and successful prediction of the separation line.
Abstract: The detachment of liquid droplets from porous material surfaces used with proton exchange membrane (PEM) fuel cells under the influence of a cross-flowing air is investigated computationally and experimentally. CCD images taken on a purpose-built transparent fuel cell have revealed that the water produced within the PEM is forming droplets on the surface of the gas-diffusion layer. These droplets are swept away if the velocity of the flowing air is above a critical value for a given droplet size. Static and dynamic contact angle measurements for three different carbon gas-diffusion layer materials obtained inside a transparent air-channel test model have been used as input to the numerical model; the latter is based on a Navier-Stokes equations flow solver incorporating the volume of fluid (VOF) two-phase flow methodology. Variable contact angle values around the gas-liquid-solid contact-line as well as their dynamic change during the droplet shape deformation process, have allowed estimation of the adhesion force between the liquid droplet and the solid surface and successful prediction of the separation line at which droplets loose their contact from the solid surface under the influence of the air stream flowing around them. Parametric studies highlight the relevant importance of various factors affecting the detachment of the liquid droplets from the solid surface.
264 citations