Numerical simulations of basic interfacial instabilities with incompressible two-fluid model

Štrubelj, Luka; Tiselj, Iztok

doi:10.1016/j.nucengdes.2010.03.032

Cited by 10 publications

(4 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two different switching algorithms have been implemented for local modification of the coefficient field. The first is based on the normalized gradient of the volume fraction similar to what was proposed by Cerne et al [11] and later used by others [12,31,32]. In this formulation, interface sharpening is switched based on comparison of the gradient of the volume fraction with some specified cut-off value * .…”

Section: 22mentioning

confidence: 99%

Numerical Investigation of Vertical Plunging Jet Using a Hybrid Multifluid–VOF Multiphase CFD Solver

Shonibare

Wardle

2015

International Journal of Chemical Engineering

View full text Add to dashboard Cite

A novel hybrid multiphase flow solver has been used to conduct simulations of a vertical plunging liquid jet. This solver combines a multifluid methodology with selective interface sharpening to enable simulation of both the initial jet impingement and the long-time entrained bubble plume phenomena. Models are implemented for variable bubble size capturing and dynamic switching of interface sharpened regions to capture transitions between the initially fully segregated flow types into the dispersed bubbly flow regime. It was found that the solver was able to capture the salient features of the flow phenomena under study and areas for quantitative improvement have been explored and identified. In particular, a population balance approach is employed and detailed calibration of the underlying models with experimental data is required to enable quantitative prediction of bubble size and distribution to capture the transition between segregated and dispersed flow types with greater fidelity.

show abstract

Section: 22mentioning

confidence: 99%

Numerical Investigation of Vertical Plunging Jet Using a Hybrid Multifluid–VOF Multiphase CFD Solver

Shonibare

Wardle

2015

International Journal of Chemical Engineering

View full text Add to dashboard Cite

show abstract

“…Then, we evaluated the effects of the mesh resolution and the IC method on numerical diffusion by using this validation process to select the optimum IC coefficient. These effects are worth noting because the fluid interface is subject to numerical diffusion in all stratified simulations [28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on an Interface Compression Method for the Volume of Fluid Approach

Okagaki

Yonomoto

Ishigaki

et al. 2021

Fluids

View full text Add to dashboard Cite

Many thermohydraulic issues about the safety of light water reactors are related to complicated two-phase flow phenomena. In these phenomena, computational fluid dynamics (CFD) analysis using the volume of fluid (VOF) method causes numerical diffusion generated by the first-order upwind scheme used in the convection term of the volume fraction equation. Thus, in this study, we focused on an interface compression (IC) method for such a VOF approach; this technique prevents numerical diffusion issues and maintains boundedness and conservation with negative diffusion. First, on a sufficiently high mesh resolution and without the IC method, the validation process was considered by comparing the amplitude growth of the interfacial wave between a two-dimensional gas sheet and a quiescent liquid using the linear theory. The disturbance growth rates were consistent with the linear theory, and the validation process was considered appropriate. Then, this validation process confirmed the effects of the IC method on numerical diffusion, and we derived the optimum value of the IC coefficient, which is the parameter that controls the numerical diffusion.

show abstract

“…Bartosiewicz et al [14] benchmarked different computational fluid dynamics (CFD) codes results for stratified two-phase flow experiments performed in a horizontal air/water channel. Strubelj and Tiselj [15] proposed an improved two-fluid model for stratified flow, and Salhi et al [16] investigated the modeling of gas-liquid interface in a two-phase stratified flow through a horizontal or nearly horizontal circular duct.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation of Stratified Gas–Liquid Flow in Downward-Inclined Pipes

Faccini

Filho

Sampaio

et al. 2015

Heat Transfer Engineering

View full text Add to dashboard Cite

This paper reports an experimental and numerical investigation of stratified gas-liquid two-phase flow in downwardinclined circular pipes. Reynolds averaged Navier-Stokes equations with the κ-ω turbulence model were solved by using the least-square finite-element method to simulate the stratified gas-liquid flow. Experiments were carried out in an air-water two-phase flow loop with a test section of 7.8-m-long circular pipe with 1 inch inner diameter for 3 downward-inclined angles, −2.5 • , −5.0 • , and −10.0 • . The height of the liquid layer was measured by using a pulse-echo ultrasonic technique with a single fast transducer and a visualization technique with a high-speed digital camera. Numerical results for the liquid height and hold-up as a function of inclination angles were compared favorably with experimental results of the present study and literature data.

show abstract

Numerical simulations of basic interfacial instabilities with incompressible two-fluid model

Cited by 10 publications

References 10 publications

Numerical Investigation of Vertical Plunging Jet Using a Hybrid Multifluid–VOF Multiphase CFD Solver

Numerical Investigation of Vertical Plunging Jet Using a Hybrid Multifluid–VOF Multiphase CFD Solver

Numerical Study on an Interface Compression Method for the Volume of Fluid Approach

Experimental and Numerical Investigation of Stratified Gas–Liquid Flow in Downward-Inclined Pipes

Contact Info

Product

Resources

About