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2D Mixing Layer Validation Case
SA Model Results
Link to SA equations
Note that thorough
grid studies were not performed for validation cases such as this one.
Some effort was made to ensure reasonable grid resolutions, but there may still be
small noticeable discretization errors. Therefore, these validation results shown should be considered
representative, but not "truth."
The plots shown compare the SA results from three independent
CFD codes: FUN3D, CFL3D, and WIND, with the
experimental data at three x-locations of 200mm, 650mm, and 950mm.
Both CFL3D and FUN3D used freestream value of the SA turbulence field variable (relative to laminar)=3,
while WIND used a value of 5.
Please read note 5 on Notes on running CFD page.
These results are from the second-finest grid (369x369, 89x161, 121x161). The y value is
normalized by the vorticity thickness (from experiment),
the U velocity is normalized by the lower-stream U velocity as well as the change in the
U velocity between lower and upper streams. The specific turbulent shear stress is normalized by
the square of the change in U velocity.
Note that these are compressible code results at "essentially incompressible" conditions of M=0.121108.
There may be a very small influence of compressibility.
The data files from CFL3D are given here:
mixinglayer_cfl3d_u_sa.dat,
mixinglayer_cfl3d_uv_sa.dat.
(Note: some of the profiles have been interpolated using Tecplot software onto pre-set points, that may or may
not correspond to the actual grid points or grid cells used in the computation.)
A typical CFL3D input file is:
delville_cfl3d_typical_sa.inp.
A typical FUN3D input file is:
fun3d.nml_typical_sa_2.
Jump to: SSTm Results,
SST-Vm Results,
SSG/LRR-RSM-w2012 Results,
Wilcox2006-klim-m Results,
K-kL-MEAH2015m Results,
EASMko2003-S Results Return to: Mixing Layer Validation Intro Page Return to: Turbulence Modeling Resource Home Page
Responsible NASA Official:
Ethan Vogel
Page Curator:
Clark Pederson
Last Updated: 02/27/2025