Add k-epsilon RANS turbulence model with wall functions - #59
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nasserma merged 8 commits intoAug 14, 2026
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Add wall-function and slope-limiter support, integrate turbulent viscosity with the INS formulation, and provide unit and full-
system test coverage.
P1 vertex-based scaling and Bernstein/Bezier limiters for L2 DG scalar fields.
Turbulent kinetic energy and dissipation transport, wall functions, and turbulent viscosity coupling with INS, with unit and full-system tests.
… for wall funcitons.
calculate velocity-based u_tau from facet-averaged tangential wall shear. retain k-based u_tau as the default method
…ed on empirical correlations
nasserma
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Aug 14, 2026
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This PR addresses the followings:
KEpsilonINS, subclass ofINS): transport equations for turbulent kinetic energy (k) and dissipation (ε), coupled eddy viscosity, and a geometry-independent wall function (KEpsilonWallFunction) for high-Re wall treatment on arbitrary meshes.opencmp/helpers/limiter.py), used to keep k and ε non-negative under DG discretization.examples/backward_facing_step) and Tutorial 11 documentation walking through the new model end-to-end.