CFD Boundary Conditions

Structure for the boundary condition tuple = ("CAPS Group Name", "Value"). "CAPS Group Name" defines the capsGroup on which the boundary condition should be applied. The "Value" can either be a JSON String dictionary (see Section JSON String Dictionary) or a single string keyword string (see Section Single Value String)

JSON String Dictionary

If "Value" is a JSON string dictionary (eg. "Value" = {"bcType": "Viscous", "wallTemperature": 1.1}) the following keywords ( = default values) may be used:

• bcType = "Inviscid"
  Boundary condition type. Options:

  • Inviscid
  • Viscous
  • Farfield
  • Extrapolate
  • Freestream
  • BackPressure
  • SubsonicInflow
  • SubsonicOutflow
  • MassflowIn
  • MassflowOut
  • MachOutflow

Wall Properties

• wallTemperature = 0.0
  The ratio of wall temperature to reference temperature for inviscid and viscous surfaces. Adiabatic wall = -1

Stagnation Properties

• totalPressure = 0.0
  Ratio of total pressure to reference pressure on a boundary surface.

• totalTemperature = 0.0
  Ratio of total temperature to reference temperature on a boundary surface.

Static Properties

• staticPressure = 0.0
  Ratio of static pressure to reference pressure on a boundary surface.

Velocity Components

• machNumber = 0.0
  Mach number on boundary.

Massflow Properties

• massflow = 0.0
  Massflow through the boundary in units of grid units squared.

Single Value String

If "Value" is a single string the following options maybe used:

• "Inviscid" (default)
• "Viscous"
• "Farfield"
• "Extrapolate"
• "Freestream"
• "SymmetryX"
• "SymmetryY"
• "SymmetryZ"