Resolving subgrid-scale structures for multiphase flows using a filament moment-of-fluid method

Hergibo, Philippe, Phillips, Timothy N. ORCID: https://orcid.org/0000-0001-6455-1205 and Xie, Zhihua ORCID: https://orcid.org/0000-0002-5180-8427 2024. Resolving subgrid-scale structures for multiphase flows using a filament moment-of-fluid method. Computers & Fluids 285 , 106455. 10.1016/j.compfluid.2024.106455

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Abstract

Multiphase flows are present in many industrial and engineering applications as well as in some physical phenomena. Capturing the interface between the phases for complex flows is challenging and requires an accurate method, especially to resolve fine-scale structures. The moment-of-fluid (MOF) method improves drastically the accuracy of interface reconstruction compared to previous geometrical methods. Instead of refining the mesh to capture increased levels of detail, the MOF method, which uses zeroth and first moments as well as a conglomeration algorithm, enables subgrid structures such as filaments to be captured at a small extra cost. Coupled to a finite volume Navier–Stokes solver, the MOF method has been tested on a fixed grid and validated using well-known benchmark problems such as dam break flows, the Rayleigh–Taylor and Kelvin–Helmholtz instability problems, and a rising bubble. The ability of the novel filament MOF method to capture the filamentary structures that eventually form for the Rayleigh–Taylor instability and rising bubble problems is assessed. Good agreement has been found with other numerical results and experimental measurements available in the literature.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering Mathematics
Publisher:	Elsevier
ISSN:	0045-7930
Funders:	EPSRC
Date of First Compliant Deposit:	29 October 2024
Date of Acceptance:	12 October 2024
Last Modified:	04 Dec 2024 09:42
URI:	https://orca.cardiff.ac.uk/id/eprint/173261

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