This is a test of the model's ability to reproduce temperature driven density stratification.

Test Reference

• Johnson, B. H (1981). “A Review of Numerical Reservoir Hydrodynamic Modeling”, U.S. Army Engineer Waterways Experiment Station, Technical Report E-81-2, February 1981.

Domain

• Plan view

• Side view

Initial Conditions

• Ambient temperature is 21.4 ^oC

Boundary Conditions

• Smagorinski coefficient = 0.0
• Background kinematic eddy viscosity = 1.0E-09 m²/s
• Manning's n = 0.005
• Inflow applied over bottom 0.15 m at upstream end
  • Flowrate of 0.00063 m³/s
  • Temperature of 16.7 ^oC

Results

• Observations show 17-18 minutes for the underflow to reach the reservoir wall
• Model results for temperature at 19 minutes. (red is higher temp, blue is lower temp)

• Mesh resolution can impact results: