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.

Numerical simulation of the initial destabilization of an air-blasted liquid layer

Abstract: Numerical simulations of a planar air/water air-blast atomization are performed using an in-house multiphase Navier–Stokes solver which uses a semi-Lagrangian geometric volume of fluid method to track the position of the interface. This solver conserves mass exactly and mitigates momentum and kinetic energy conservation errors. Excellent agreement with recent experiments is obtained when comparing physical quantities, such as the liquid cone length, maximum wave frequency and spatial growth rate of the primary instability. The inclination of the gas inflow, which mimics the slope of the separator plate, is shown to enhance the primary atomization. A three-dimensional large-eddy simulation, run using physically correct air/water parameters, is used to provide the statistics of the flow. The gas layer is laminar close to the entrance and becomes turbulent at positions further downstream. The liquid wave crests expand in thin sheets, which break into secondary droplets, as observed in experiments.

Predicting the Displacement of Yoghurt by Water in a Pipe Using CFD

Abstract: A numerical scheme based on the volume of fluid (VOF) method for predicting the displacement of one liquid by another has been verified versus electrical resistance tomography (ERT) and ultrasonic velocity profile (UVP) measurements for the displacement of yoghurt by water. The scheme using the VOF method predicts the skewed phase distribution as measured using ERT and the global structure of the velocity profile as measured using UVP. The phase distribution using the VOF method was compared with the results using the species transport model which allows for mixing between the phases. The species transport model was found to be less suitable for predicting the displacement of yoghurt by water since the turbulence model was unable to accurately predict the turbulent viscosity in the mixing zone between yoghurt and water, which resulted in a too high rate of mixing.

A Two-Step Shape-Preserving Advection Scheme

Abstract: This paper proposes a new two-step non-oscillatory shape-preserving positive definite finite difference advection transport scheme, which merges the advantages of small dispersion error in the simple first-order upstream scheme and small dissipation error in the simple second-order Lax-Wendroff scheme and is completely different from most of present positive definite advection schemes which are based on revising the upstream scheme results. The proposed scheme is much less time consuming than present shape-preserving or non-oscillatory advection transport schemes and produces results which are comparable to the results obtained from the present more complicated schemes. Elementary tests are also presented to examine the behavior of the scheme.