A zonal grid method for incompressible two-phase flows

A zonal grid method for incompressible two-phase flows

•A new zonal grid based numerical method applicable to two-phase flows.•Strong reduction of the computational time for flows with high speed gradients.•Possibility to use multi-models, multi-solvers and multi- timesteps.•successfully applied on a full 3D liquid jet atomization configuration. We pres...

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Bibliographic Details
Published in:Computers & fluids Vol. 180; pp. 22 - 40
Main Authors: Dabonneville, F., Hecht, N., Reveillon, J., Pinon, G., Demoulin, F.X.
Format: Journal Article
Language:English
Published: Amsterdam Elsevier Ltd 15-02-2019
Elsevier BV
Elsevier
Subjects:
Atomizing
Computational fluid dynamics
Computer Science
Computer simulation
Configuration management
Domains
Finite element method
Fluid flow
Fluid mechanics
Grid method
Incompressible flow
Interface
Mathematical models
Mechanics
Modeling and Simulation
Multi-phase
Multi-solver
Numerical methods
Physics
Two phase flow
Velocity gradient
Zonal grid
Zonal grid
Multi-phase
Multi-solver
Interface
multi-solver
zonal grid
multi-phase
interface
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Description
Summary:•A new zonal grid based numerical method applicable to two-phase flows.•Strong reduction of the computational time for flows with high speed gradients.•Possibility to use multi-models, multi-solvers and multi- timesteps.•successfully applied on a full 3D liquid jet atomization configuration. We present a zonal grid based numerical method applicable to two-phase flows. The method is aimed at reducing the computational costs for interfacial flows involving local high velocity gradients such as those encountered in atomization systems. The objective is to fully resolve the primary atomization region while at the same time limiting the number of grid points in secondary or dispersed zones where a very fine grid is not required, along with the ability to use a local zone based time step. Calculations of a rising bubble and liquid jet atomization configurations were performed on a coarse grid with a fine zone superimposed on small domains with the strongest gradient. The results show good agreement with simulations carried out with a complete refined mesh with only a fraction of the CPU time. The results indicate that the two-phase zonal grid model approach introduced here has the potential to provide an accurate and cost-effective approach for modeling two-phase flow problems that have multiple temporal and spatial scales.
ISSN:0045-7930
1879-0747
DOI:10.1016/j.compfluid.2018.12.016