BASIC kOmega-SST Boundary Conditions

kω-SST (komegaSST) Boundary Conditions

Here the basic boundary conditions if you are using the kOmegaSST model in OpenFOAM:

At the wall:

• ω (omega) – specific dissipation rate
  • BC type: fixedValue
  • BC value:

Note: The omegaWallFunction actually calculates this BC value for omega at the wall. Therefore, you can use it, even if you aren’t using wall-functions. It just applies the correct value for omega at the wall.

• k – turbulent kinetic energy
  • BC type: fixedValue
  • BC value: 0
• nut – turbulent viscosity
  • BC type: fixedValue
  • BC value: 0

In the free-stream:

• ω (omega) – specific dissipation rate
  • BC type: fixedValue
  • BC value:
• k – turbulent kinetic energy
  • BC type: fixedValue
  • BC value:
• nut – turbulent viscosity
  • BC type: calculated
  • BC value: 0 (this is just an initial value)

where , and is the normal distance from the wall to the first cell center.