A series of 105 Kelvin-Helmholtz simulations were preformed to train a machine learning algorithm.
Simulation Specs
In order to conserve computational resources, each case was started on a
2D x-z domain and was then remeshed to 3D after billow formation. Noise
addition at the time of remeshing provides seeds for 3D instabilities.
The output variables are normalized by half the velocity jump across the
layer and the shear thickness. The total simulation time is 360 h/U,
with 24 equally spaced 3D volume file outputs.
The following parameters were modified:
Richardson Number
0.0, 0.05, 0.1, 0.15
Reynolds Number
1000, 2000, 3000, 4000, 5000
Initial Velocity Perturbations
0.001, 0.01, 0.1
Duct
For applicable cases, namely Richardson number greater than zero, a duct was also imposed.
The location and width of the duct were set the same as the shear layer: centered in the domain with a width of 1. The Reynolds number
is taken at the center of the duct/shear layer. The duct ratio to the edge of the
domain is 8.
Animations of vorticity magnitude in a xz plane
From left to right, the initial noise increases. Duct cases are shown directly below. Note: The time
shown in animation does not have units (min) and is dimensionless.