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Free-Surface Seiche

This is an analytic test case for the accuracy of the implementation of the temporal acceleration term.

analytic solution

 

analytic solution 2

Domain

  • Flat bottomed cuboid flume
  • 120,000 m length
  • 100 m width
  • 100 m mean water depth
  • 0.5 m peak to peak amplitude
  • 240,000 m and 80,000 m wavelength
  • Mesh resolution:
    • Base
    • Adapted
    • Twice refined

Initial Conditions

  • 0.5 m peak to peak amplitude
  • Background kinematic eddy viscosity = 0.0 m2/sec
  • Manning's n = 0.0
  • Turbulence model is off

domain initial state

Test Domain and Initial State

Boundary Conditions

  • Initial perturbation as defined above
  • No defined time varying conditions

Results

  • Water surface elevation at x=81,000 m, 1 Mode

water surface elevation

  • Water surface elevation at x=81,000 m, 3 Modes

water surface elevation 3 modes

  • X direction velocity at x=81,000 m, 1 Mode

x direction velocity 1 mode

  • Z direction velocity at x=81,000 m, 1 Mode

z direction velocity 1 mode