AFDM: An Advanced Fluid-Dynamics Model

Bohl, W.R.; Parker, Frazier; Wilhelm, D.; Berthier, Jean; Goutagny, L.; Ninokata,

doi:10.2172/6664961

Cited by 20 publications

(6 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…I emphasize this point as in the current state of the art for modeling of multi-dimensional, multi-phase flows this step is performed numerically e.g. Liles and Reed (1978), Thurgood et al (1983), Kolev (1986), Bohl et al (1988) e.g., void fractions less than zero or greater than one, or if the variation of the new time variable from the old variable is implausibly large, then the solution is run back to the beginning of the time step, the variables are set to their old time value, the time step is reduced and the computation repeated. This is implemented to ensure that the linearized equations are sufficiently representative of the non-linear equations to provide an acceptable level of calculation accuracy.…”

Section: A Newton-type Iteration Methods For Multi-phase Flowsmentioning

confidence: 99%

Numerical Solution Methods for Multi-phase Flow Problems

Kolev¹

2015

Multiphase Flow Dynamics 1

View full text Add to dashboard Cite

A class of implicit numerical solution methods for multi-phase flow problems based on the entropy concept is presented in this work. First order donor-cellThis Chapter is an extended version of the theoretical part of the publication Kolev (1996). IntroductionNumerical methods for transient single-phase flow analysis are available and in widespread use for practical applications. Methods for cost-effective solution of multi-phase flow problems are still in their infancy. There is a significant experience base available for two-phase flows, e.g. gas/liquid and dispersed solid particles/gas flow for the special case of small concentrations in the dispersed phase. To my knowledge, there is no universal method for integrating systems of partial differential equations describing multi-phase flows. The purpose of this work is to present the methods derived for the computer codes IVA2 to IVA6 and to give a short description of the experience gained with these methods.

show abstract

Section: A Newton-type Iteration Methods For Multi-phase Flowsmentioning

confidence: 99%

Numerical Solution Methods for Multi-phase Flow Problems

Kolev¹

2015

Multiphase Flow Dynamics 1

View full text Add to dashboard Cite

show abstract

“…This is a four-step algorithm developed for the advanced fluid dynamics model [10]. In step 1 of this algorithm, intra-cell transfers are solved without considering the convection terms.…”

Section: Fluid Dynamics Algorithmmentioning

confidence: 99%

Numerical simulations of gas–liquid–particle three-phase flows using a hybrid method

Guo

Morita

Tobita

2015

Journal of Nuclear Science and Technology

View full text Add to dashboard Cite

For the analysis of debris behavior in core disruptive accidents of liquid metal fast reactors, a hybrid computational tool was developed using the discrete element method (DEM) for calculation of solid particle dynamics and a multi-fluid model of a reactor safety analysis code, SIMMER-III, to reasonably simulate transient behavior of three-phase flows of gas-liquid-particle mixtures. A coupling numerical algorithm was developed to combine the DEM and fluid-dynamic calculations, which are based on an explicit and a semi-implicit method, respectively. The developed method was validated based on experiments of waterparticle dam break and fluidized bed in systems of gas-liquid-particle flows. Reasonable agreements between the simulation results and experimental data demonstrate the validity of the present method for complicated three-phase flows with large amounts of solid particles.

show abstract

“…On the basis of the fluid dynamic models of SIMMER-II (Bohl and Luck, 1990a) and AFDM (Bohl et al, 1990b), a two-dimensional, multi-velocity-field, multiphase, multicomponent, Eulerian fluid dynamics model coupled with a fuelpin model and a space-and energy-dependent neutron kinetics model has been developed for SIMMER-III. Currently, three flow regimes, including bubbly, dispersed, and in-between transition flow regimes, are modeled in the SIMMER-III code for pool flows (Tobita et al, 1991).…”

Section: Multiphase Flow Modelmentioning

confidence: 99%