turbulenceteam | 3D Kolmogorov flow with large-scale damping @turbulenceteamms | Uploaded 3 years ago | Updated 3 hours ago
Turbulent flows can be understood as the superposition of a mean flow, which evolves slowly and is shaped by boundaries or forcing mechanisms, and a multitude of chaotic, short-lived fluctuations.
This video shows the vorticity field of a three-dimensional Kolmogorov flow with large-scale damping on an aspect-ratio-three domain, obtained from a pseudo-spectral simulation. Planes show out-of-plane vorticity averaged over the normal direction, and the vorticity magnitude is volume-rendered.
The flow exhibits a large-scale state with three pairs of counter-rotating vortices. The small-scale turbulence,
illustrated by the volume rendering, is nearly homogenous. This is markedly different from the case without
damping (see https://youtu.be/m1aGCnWSrOw).
Please see https://arxiv.org/abs/2102.07675 for further details.
Turbulent flows can be understood as the superposition of a mean flow, which evolves slowly and is shaped by boundaries or forcing mechanisms, and a multitude of chaotic, short-lived fluctuations.
This video shows the vorticity field of a three-dimensional Kolmogorov flow with large-scale damping on an aspect-ratio-three domain, obtained from a pseudo-spectral simulation. Planes show out-of-plane vorticity averaged over the normal direction, and the vorticity magnitude is volume-rendered.
The flow exhibits a large-scale state with three pairs of counter-rotating vortices. The small-scale turbulence,
illustrated by the volume rendering, is nearly homogenous. This is markedly different from the case without
damping (see https://youtu.be/m1aGCnWSrOw).
Please see https://arxiv.org/abs/2102.07675 for further details.
