Test Reference

• Wang, S. S. Y, Jia, Y, Roche, P.J, Smith, P.E and Schmalz, R.A (2009). “Verification and Validation of 3D Free Surface Flow Models”, American Society of Civil Engineering.

Domain

• Flat bottomed cuboid flume
• 100,000 m length
• 10,000 m width
• Three flume orientations:
  • x axis aligned
  • y axis aligned
  • 45 degrees

• Two mesh resolutions:
  • 500 m
  • 1,000 m


• Four vertical layer resolutions:
  • 6 layers
  • 8 layers
  • 12 layers
  • 20 layers

Initial Conditions

• 40 meter water depth
• Vertical eddy viscosity = 0.03 m²/s

Boundary Conditions

• Constant wind in flume alignment direction
  • Shear stress of 0.1 N/m²
  • Shear stress of 0.5 N/m²

• No time varying boundary conditions

Results

• Analytic solutions:
  • Water surface elevation slope along the flume

             ​

• Vertical velocity profile

• Model computed depths for the three flume orientations with a constant wind shear of 0.1 N/m²

• Vertical velocity comparisons at mesh center with a constant wind shear of 0.1 N/m²

• Vertical velocity comparisons at mesh center with a constant wind shear of 0.5 N/m²

Simulation Parameters

• SGI Altix ICE 8200 (Diamond)
• 8 processors
• 13 minutes to 1.5 hour simulation times
• PC simulations as well with equivalent results but 5-10 times longer run time