twoPhaseInterTrackFoam: an OpenFOAM module for Arbitrary Lagrangian/Eulerian Interface Tracking with Surfactants and Subgrid-Scale Modeling

We present an implementation of the unstructured Finite-Volume Arbitrary Lagrangian / Eule-
rian (ALE) Interface-Tracking method for simulating incompressible, immiscible two-phase flows as
an OpenFOAM module [1][2]. In addition to interface-tracking capabilities that include tracking of
two fluid phases, an implementation of a Subgrid-Scale (SGS) modeling framework for increased ac-
curacy when simulating sharp boundary layers is enclosed. The SGS modeling framework simplifies
embedding subgrid-scale profiles into the unstructured Finite Volume discretization. Our design of
the SGS model library significantly simplifies adding new SGS models and applying SGS modeling
to Partial Differential Equations (PDEs) in OpenFOAM.
In the training we show-case how to take advantage from the SGS in your solver and what
features the SGS has. We will set up a parameter study with the SGS. The parameter study will be
automatically evaluated and show how to make it part of a Continuous Integration (CI) pipeline.
The workflow presented at last’ years OFW will be employed [3].

[1] Schwarzmeier, M., Raju, S., Tuković, Ž., Fricke, M., Bothe, D., & Marić, T. (2024). twoPha-
seInterTrackFoam: An OpenFOAM module for Arbitrary Lagrangian/Eulerian Interface Track-
ing with Surfactants and Subgrid-Scale Modeling. https://doi.org/10.48550/ARXIV.2403.19523
https://gitlab.com/interface-tracking/twophaseintertrackfoamrelease

[2] code available at https://gitlab.com/interface-tracking/twophaseintertrackfoamrelease

[3] Schwarzmeier, M., Marić, T., Tolle, T., Gläser, D., Lehr, J.-P., Pappagianidis, I., Lambie, B.,
Bothe, D., & Bischof, C. (2023, July 14). A Research Software Engineering workflow for OpenFOAM
in university research groups. 18th OpenFOAM Workshop 2023, Genoa, Italy; virtual. Zenodo.
https://doi.org/10.5281/zenodo.8146336

Update:
The presentation video is available at https://www.youtube.com/watch?v=HuMxVNsBouQ.