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Multiscale modelling of multiphase flow with complex interactions

Record type: Article

This paper presents a variety of modeling and simulation methods for complex multiphase flow at microscopic, mesoscopic and macroscopic scales. Each method is discussed in terms of its scale-resolving capability and its relationship with other approaches. Examples of application are provided using a liquid–gas system, in which complex multiscale interactions exist among flow, turbulence, combustion and droplet dynamics. Large eddy simulation (LES) is employed to study the effects of a very large number of droplets on turbulent combustion in two configurations in a fixed laboratory frame. Direct numerical simulation (DNS) in a moving frame is then deployed to reveal detailed dynamic interactions between droplets and reaction zones. In both the LES and the DNS, evaporating droplets are modeled in a Lagrangian macroscopic approach, and have two-way couplings with the carrier gas phase. Finally, droplet collisions are studied using a multiple-relaxation-time lattice Boltzmann method (LBM). The LBM treats multiphase flow with real-fluid equations of state, which are stable and can cope with high density ratios. Examples of successful simulations of droplet coalescence and off-center separation are given. The paper ends with a summary of results and a discussion on hybrid multiscale approaches

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Citation

Luo, K.H., Xia, J. and Monaco, E. (2009) Multiscale modelling of multiphase flow with complex interactions Journal of Multiscale Modelling, 1, (1), pp. 125-156. (doi:10.1142/S1756973709000074).

More information

Published date: January 2009
Keywords: multiscale modeling, multiphase flow, reacting flow, droplet collisions, direct numerical simulation, large eddy simulation, lattice boltzmann method

Identifiers

Local EPrints ID: 69189
URI: http://eprints.soton.ac.uk/id/eprint/69189
ISSN: 1756-9737
PURE UUID: d4a76cd0-cbd1-4aec-904f-56c0c706a444

Catalogue record

Date deposited: 23 Oct 2009
Last modified: 19 Jul 2017 00:13

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