Proposed Changes

Give a brief overview of your contribution here in a few sentences.

Implemented the option for vorticity confinement technique as a feature branch on the latest su2code/SU2:develop branch.

Descretized schemes offer numerical diffusion which results in lower resolution and accuracy in solution. This issue is especially observed in vortex dominated flows. A fine mesh will be necessary to get a solution with good accuracy. This increases the computation time and cost. A better technique is required which provides reasonably good accuracy without increasing the computation time and costs much.

Vorticity confinement technique is a proven procedure that helps in reducing numerical diffusion offered by the scheme. Results from the literature shows that using the vorticity confinement technique, a better resolution is achieved in the problems like flow behind bluff bodies, rotors, wings etc.

References

J. Steinhoff and D. Underhill, ``Modification of the euler equations for vorticity confinement: Application to the computation of interacting vortex rings,'' Physics of Fluids, vol.6, no.8, pp. 2738--2744, 1994. https://doi.org/10.1063/1.868164

D. A. Caughey and M. M. Hafez, Frontiers of Computational Fluid Dynamics 2006. WORLD SCIENTIFIC, 2005. https://www.worldscientific.com/doi/abs/10.1142/5963

R. Loehner and C. Yang, Vorticity confinement on unstructured grids, 40th AIAA Aerospace Sciences Meeting & Exhibit, 2002. [Online]. Available: https://arc. aiaa.org/doi/abs/10.2514/6.2002-137

A. Povitsky and K. C. Pierson, ``Vorticity confinement applied to accurate prediction of convection of wing tip vortices and induced drag,'' International Journal of Computational Fluid Dynamics, vol. 35, no. 3, pp. 143--156, 2021. https://doi.org/10.1080/10618562.2020.1856822

Related Work

Resolve any issues (bug fix or feature request), note any related PRs, or mention interactions with the work of others, if any.

PR Checklist

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• I am submitting my contribution to the develop branch.
• My contribution generates no new compiler warnings (try with --warnlevel=3 when using meson).
• My contribution is commented and consistent with SU2 style (https://su2code.github.io/docs_v7/Style-Guide/).
• I have added a test case that demonstrates my contribution, if necessary.
• I have updated appropriate documentation (Tutorials, Docs Page, config_template.cpp), if necessary.