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2D Coriolis

Domain

  • rectangular, flat bottomed flume
  • 100,000 m length
  • 5,000 m width
  • 1 m height
  • 45 degree latitude

2D coriolis domain

Initial Conditions

  • depth of 1 meter
  • no flow

Boundary Conditions

  • length directed discharge = 1000 cms
  • downstream tailwater = 1 m
  • Run simulation to steady state

Run Files

The mesh (*.3dm), boundary condition (*.bc), and hotstart file (*.hot) can be downloaded from https://github.com/erdc/AdH-V-V-input-files.

  • 2D-coriolis_X.3dm
  • 2D-coriolis_X.bc
  • 2D-coriolis_X.hot
  • 2D-coriolis_Y.3dm
  • 2D-coriolis_Y.bc
  • 2D-coriolis_Y.hot

Results

  • Analytic solution for x direction flow
    • assume uniform flow
    • y velocity = 0.0
    • change in u velocity with respect to x = 0.0

  coriolis analytic

    = -2.0988e-6 m/m

  • AdH computed slope = -2.0933e-6
  • Velocity shows a curvature to the right which is supported by Coriolis theory

  2D coriolis x results

  • Analytic solution for y direction flow
    • assume uniform flow
    • x velocity = 0.0
    • change in v velocity with respect to y = 0.0
    • water surface slope is again = -2.0988e-6 m/m

    •  
  • AdH computes slope = -2.0357e-6
  • Velocity shows a curvature to the right which is again supported by Coriolis theory

2D coriolis y results