Two-phase electrohydrodynamic simulations using a volume-of-fluid approach: A comment

Wilko Rohlfs*, Georg F. Dietze, Herman D. Haustein, Reinhod Kneer

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

10 Citations (Scopus)

Abstract

This comment refers to the article of Tomar et al. [1], which presents a numerical methodology of a continuum surface force formulation for simulating two-phase electrohydrodynamic flows. The present work shows, that due to the diffusive character of the Laplacian equation (∇ · (ϵϵ0E) = 0) with discontinuous physical properties (ϵ(x, y, z)), different averaging methods (arithmetic and harmonic) for the fluid property in the transition region have to be applied. The correct choice of the averaging method depends on the orientation of the flux to the interface.

An additional improvement is made by calculating the electric displacement D at the cell faces. This leads to a numerical solution independent of the spatial resolution as well as of the interfacial smearing. Simulation results of two different test cases show that the error of the numerical solution is in the order of machine precision.
Original languageUndefined
Pages (from-to)4454-4463
JournalJournal of computational physics
Volume231
Issue number12
Early online date21 Feb 2012
DOIs
Publication statusPublished - 20 Jun 2012
Externally publishedYes

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