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A robust method for calculating interface curvature and normal vectors using an extracted local level set

Abstract

The level-set method is a popular interface tracking method in two-phase flow simulations. An often-cited reason for using it is that the method naturally handles topological changes in the interface, e.g. merging drops, due to the implicit formulation. It is also said that the interface curvature and normal vectors are easily calculated. This last point is not, however, the case in the moments during a topological change, as several authors have already pointed out. Various methods have been employed to circumvent the problem. In this paper, we present a new such method which retains the implicit level-set representation of the surface and handles general interface configurations. It is demonstrated that the method extends easily to 3D. The method is validated on static interface configurations, and then applied to two-phase flow simulations where the method outperforms the standard method and the results agree well with experiments.Copyright © 2013 Elsevier B.V

Category

Academic article

Client

  • Research Council of Norway (RCN) / 193062

Language

English

Author(s)

Affiliation

  • Norwegian University of Science and Technology
  • SINTEF Energy Research / Gassteknologi

Year

2014

Published in

Journal of Computational Physics

ISSN

0021-9991

Publisher

Elsevier

Volume

257

Page(s)

259 - 277

External resources

View this publication at Cristin