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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TL;DR: In this article, the SST k-ω turbulence scheme with turbulence damping at the interface gives better predictions than the standard K-e and RNG k-e models for the case under consideration.
63 citations
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01 Jan 2004TL;DR: In this paper, numerical simulations of two-phase flow with high-density ratio, taking into account mass transport of a soluble component and its interfacial mass transfer, are presented, where single bubbles are held in counter-flow to investigate the transient dissolution of a dilute species.
Abstract: This paper presents numerical simulations of two-phase flow with high-density ratio, taking into account mass transport of a soluble component and its interfacial mass transfer. The mathematical model and the numerical method allow for different solubility of the species in the respective fluid phases, while volume changes due to mass transfer a reneglected. The discontinuous changes in species concentration sat the interface are modeled by means of Henry’s law. Simulations are carried out with a next ended version of the highly parallelized code FS3D, which employs an advanced Volume-Of-Fluid(VOF) method. For the examination of mass transfer, single bubbles are held in counter-flow to investigate the transient dissolution of a dilute species. In case of small bubbles with laminar wake a rotational symmetric concentration profile occurs, in agreement with theoretical considerations, while the local mass concentrations in the wake of larger bubbles show complex patterns of varying concentration as it also has been recently observed experimentally.
63 citations
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TL;DR: This work develops a particular algorithm, based on modern shock-capture techniques, employing a two-step nonlinear method that approaches the optimal accuracy of modernshock- capture techniques with a minimal increase in computational time and memory.
Abstract: Effective numerical treatment of multicomponent viscous flow problems involving the advection of sharp interfaces between materials of differing physical properties requires correction techniques to prevent spurious diffusion and dispersion. We develop a particular algorithm, based on modern shock-capture techniques, employing a two-step nonlinear method. The first step involves the global application of a high-order upwind scheme to a hyperbolic advection equation used to model the distribution of distinct material components in a flow field. The second step is corrective and involves the application of a global filter designed to remove dispersion errors that result from the advection of discontinuities (e.g., material interfaces) by high-order, minimally dissipative schemes. The filter introduces no additional diffusion error. Nonuniform viscosity across a material interface is allowed for by the implementation of a compositionally weighted-inverse interface viscosity scheme. The combined method approaches the optimal accuracy of modern shock-capture techniques with a minimal increase in computational time and memory. A key advantage of this method is its simplicity to incorporate into preexisting codes be they finite difference, element, or volume of two or three dimensions.
63 citations
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25 May 2004-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, a three-dimensional computer-aided analysis system was developed to simulate the formation, ejection, and impact of a liquid droplet in a squeeze-type piezoelectric inkjet printing device.
Abstract: A three-dimensional computer-aided analysis system has been developed in this study to simulate the formation, ejection, and impact of a liquid droplet in a squeeze-type piezoelectric inkjet printing device. The computer simulation system is based on a solution algorithm (SOLA) scheme for the solution of velocity and pressure fields. It is coupled with volume-of-fluid (VOF) and piecewise-linear interface construction (PLIC) techniques for the transport of F values, which are the volume fractions of liquid in the cells, and construction of the interface. For the treatment of surface tension effects, a CSF (continuum surface force) model is employed. The pressure at the nozzle inlet, which is related to the applied voltage, imposed on the simulation system is determined by the propagation theory of acoustic waves. The simulated results are rather consistent with the experimental observations in terms of droplet morphology, break-up time, flying distance, and droplet volume.
63 citations
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TL;DR: In this article, the growth of a capillary instability and the breakup of a jet were simulated using a one-fluid model to describe the two-phase flow motion and a VOF approach to capture the interface.
62 citations