[HouchinM]

Hi FOAMers,

I am trying to set a fanPressure boundary condition within a ducted fan, using the createBaffles function to create two patches within a ducted fan casing.

I have created the baffles and assigned them as fanPressure boundaries in the p initial conditions as such:

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  3.0.x                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
|*---------------------------------------------------------------------------*|
|* OpenFOAM for Windows 16.06 (v1)                                           *|
|* Built by CFD Support, www.cfdsupport.com (based on Symscape).             *|
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      binary;
    class       volScalarField;
    location    "0";
    object      p;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 2 -2 0 0 0 0];

internalField   uniform 0;

boundaryField
{
    atmosphereBoundary
    {
        type            fixedValue;
        value           uniform 0;
    }
    ductWork
    {
        type            zeroGradient;
    }
    fanCasing
    {
        type            zeroGradient;
    }
    plenumWall
    {
        type            zeroGradient;
    }
    systemBoundary
    {
        type            fixedValue;
        value           uniform 0;
    }
    fanOutlet
    {
        type            fanPressure;
		fileName        "fanCurve";
		outOfBounds     clamp;
		direction       out;              // in | out
		p0              uniform 0;
		value           uniform 50;
		gamma			0;
    }
    fanInlet
    {
        type            fanPressure;
		fileName        "fanCurve";
		outOfBounds     clamp;
		direction       in;              // in | out
		p0              uniform 0;
		value           uniform -50;
		gamma			0;
    }
}

I cannot seem to reverse the direction of the fan by switching the direction within the p initial conditions file. Is the direction of the boundary condition reversible?

Regards,

Matt

[HouchinM]

All,

I have found a solution to the above problem in case you are looking for a solution...

The direction of the fan can be switched by reversing the actions.sourceInfo.options variable from master to slave in the toposet dict:

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  3.0.x                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      topoSetDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
actions
(
	{
		name 	fanSource;
		type	faceZoneSet;
		action 	new;
		source	searchableSurfaceToFaceZone;
		sourceInfo
		{
			surface triSurfaceMesh;
			name	baffle_1.stl;
		}
	}
	{
		name	fanSourceSlave;
		type	cellSet;
		action	new;
		source	faceZoneToCell;
		sourceInfo
		{
			name	fanSource;
			option	slave;
		}
	}
	{
		name		fanSourceFace;
		type		faceZoneSet;
		action		new;
		source		setsToFaceZone;
		sourceInfo
		{
			faceSet	fanSource;
			cellSet	fanSourceSlave;
		}
	}
);

// ************************************************************************* /
/