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Results Gallery

The best way to compare the two simulations is to watch the animations included on this Web page
  • Upstream from the spillway, the flow was nearly identical, as expected.
  • The flickering "plume" patterns formed by the x-velocity between the obstacles have approximately the same extent and rhythm.
  • A large wave forms during the first 150 time-steps, followed by a backward-moving wavelet. Both features are captured in both simulations.
  • Downstream from the obstacles, the shape of the free surface exhibits fine detail that is different in the wide and narrow simulations. However, the large waves generated at the point where water pours into the lower level of the dam rise and fall at the same rhythm.
Overall, the narrow domain yielded results that are qualitatively very similar to those obtained using the wide domain. No quantitative comparisons were performed. This could be an interesting follow-up to this project. A second simulation was started (250 time-steps completed) using the narrow domain but doubling the refinement at the surface. Additional future work on this project may involve completing this refined simulation to find out whether the increased refinement brings the results any closer to the wide simulation.

Periodic Boundary After 80 Time-Steps
X-velocity (GIF)
red=forward, blue=backward
Y-velocity (GIF)
red=left, blue=right, facing downstream
Z-velocity (GIF)
red=up, blue=down

Spillway Flow
(Showing X-velocity)

MPEG, 683 Kb

Free Surface Motion
(wide domain/narrow domain)

MPEG, 588 Kb

Y-velocity Around Bumps

MPEG, 359 Kb

X-velocity Around Bumps

MPEG, 543 Kb

Velocity Vectors
at the Surface

MPEG, 620 Kb

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