Common Combinations

Table of Contents

• Pressure-velocity systems
  • Subsonic
    • Incompressible
    • Compressible
    • Return flow options
  • Supersonic
• Heat transfer
  • Walls
• Mesh motion

Pressure-velocity systems

Subsonic

Incompressible

Inlet		Outlet		Stability
Physics	OpenFOAM	Physics	OpenFOAM
Volume flow rate	flowRateVelocity	Static pressure	fixedValue	Excellent
Total pressure	totalPressure	Total pressure	totalPressure	Very good
Total pressure	totalPressure	Static pressure	fixedValue	Good
Static pressure	fixedValue	Static pressure	fixedValue	Poor

Compressible

Inlet		Outlet		Stability
Physics	OpenFOAM	Physics	OpenFOAM
Mass flow rate	flowRateVelocity	Static pressure	fixedValue	Excellent
Total pressure	totalPressure	Total pressure	totalPressure	Very good
Total pressure	totalPressure	Static pressure	fixedValue	Good
Static pressure	fixedValue	Static pressure	fixedValue	Poor

Return flow options

Type	Condition	Stability
Outflow	zeroGradient	Unstable if flow reverses
Blocked	inletOutlet	Good, but unphysical
Return flow I	pressureInletOutlet	Good
Return flow II	totalPressure	Very good

Supersonic

Heat transfer

Walls

Type	Condition
Adiabatic	zeroGradient
Fixed temperature	fixedValue
Fixed heat flux	fixedGradient

Mesh motion

Type	Condition
Moving wall	movingWallVelocity Would you like to suggest an improvement to this page? Create an issue Copyright © 2016 OpenCFD Ltd. Licensed under the Creative Commons License BY-NC-ND