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Total Pressure Boundary Condition

Total pressure is uniform total pressure applied everywhere in the inlet patch. Total pressure value is equal to p0.

p:

 boundaryField
 {
    ".*_inlet"
    {
        type            totalPressure;
        p0              uniform 97.5;
        gamma		 0.0;
        value           $internalField;
    }
 }



U:

 boundaryField
 {
    ".*_inlet"
    {
        type            pressureInletVelocity;
        value           $internalField;
    }
  }

Running Simulation - Parallel Run - Domain Decomposition

To run simulation in parallel the model regions have to be decomposed first. Utility decomposePar reads settings from system/decomposeParDict, it is recommended to use automatic decomposition method scotch.

 

numberOfSubdomains 4;

method         scotch;

Each region has to be decomposed individually:

# decomposePar -region spiral > log.decomposePar.spiral
# decomposePar -region rotor > log.decomposePar.rotor
# decomposePar -region drafttube > log.decomposePar.drafttube

Bash script can be used for decomposition:

 

#!/bin/sh
decomposePar -force -region spiral > log.decomposePar.spiral &
decomposePar -force -region rotor > log.decomposePar.rotor &
decomposePar -force -region drafttube > log.decomposePar.drafttube

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Turbulent Flow

There are a lot of turbulence models available in OpenFOAM. It is possible to list all of them, that can be used within simpleFoam with following command.
# simpleFoam -listTurbulenceModels
The same command also works with other solvers.