diff --git a/src/finiteVolume/fields/fvPatchFields/derived/fanPressure/fanPressureFvPatchScalarField.C b/src/finiteVolume/fields/fvPatchFields/derived/fanPressure/fanPressureFvPatchScalarField.C
index 2cc9641d52b9b4008e9e2a14294f15afb39cccb7..9719903efc9c37a9667755f7114c466c7f6e3d1a 100644
--- a/src/finiteVolume/fields/fvPatchFields/derived/fanPressure/fanPressureFvPatchScalarField.C
+++ b/src/finiteVolume/fields/fvPatchFields/derived/fanPressure/fanPressureFvPatchScalarField.C
@@ -3,7 +3,7 @@
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2011-2016 OpenFOAM Foundation
- \\/ M anipulation |
+ \\/ M anipulation | Copyright (C) 2017 OpenCFD Ltd
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@@ -61,7 +61,10 @@ Foam::fanPressureFvPatchScalarField::fanPressureFvPatchScalarField
:
totalPressureFvPatchScalarField(p, iF),
fanCurve_(),
- direction_(ffdOut)
+ direction_(ffdOut),
+ nonDimensional_(false),
+ rpm_(0.0),
+ dm_(0.0)
{}
@@ -75,7 +78,10 @@ Foam::fanPressureFvPatchScalarField::fanPressureFvPatchScalarField
:
totalPressureFvPatchScalarField(ptf, p, iF, mapper),
fanCurve_(ptf.fanCurve_),
- direction_(ptf.direction_)
+ direction_(ptf.direction_),
+ nonDimensional_(ptf.nonDimensional_),
+ rpm_(ptf.rpm_),
+ dm_(ptf.dm_)
{}
@@ -88,8 +94,17 @@ Foam::fanPressureFvPatchScalarField::fanPressureFvPatchScalarField
:
totalPressureFvPatchScalarField(p, iF, dict),
fanCurve_(dict),
- direction_(fanFlowDirectionNames_.read(dict.lookup("direction")))
-{}
+ direction_(fanFlowDirectionNames_.read(dict.lookup("direction"))),
+ nonDimensional_(dict.lookupOrDefault<Switch>("nonDimensional", false)),
+ rpm_(dict.lookupOrDefault<scalar>("rpm", 0.0)),
+ dm_(dict.lookupOrDefault<scalar>("dm", 0.0))
+{
+ if (nonDimensional_)
+ {
+ dict.lookup("rpm") >> rpm_;
+ dict.lookup("dm") >> dm_;
+ }
+}
Foam::fanPressureFvPatchScalarField::fanPressureFvPatchScalarField
@@ -99,7 +114,10 @@ Foam::fanPressureFvPatchScalarField::fanPressureFvPatchScalarField
:
totalPressureFvPatchScalarField(pfopsf),
fanCurve_(pfopsf.fanCurve_),
- direction_(pfopsf.direction_)
+ direction_(pfopsf.direction_),
+ nonDimensional_(pfopsf.nonDimensional_),
+ rpm_(pfopsf.rpm_),
+ dm_(pfopsf.dm_)
{}
@@ -111,7 +129,10 @@ Foam::fanPressureFvPatchScalarField::fanPressureFvPatchScalarField
:
totalPressureFvPatchScalarField(pfopsf, iF),
fanCurve_(pfopsf.fanCurve_),
- direction_(pfopsf.direction_)
+ direction_(pfopsf.direction_),
+ nonDimensional_(pfopsf.nonDimensional_),
+ rpm_(pfopsf.rpm_),
+ dm_(pfopsf.dm_)
{}
@@ -156,8 +177,21 @@ void Foam::fanPressureFvPatchScalarField::updateCoeffs()
<< exit(FatalError);
}
+ if (nonDimensional_)
+ {
+ // Create an adimensional flow rate
+ volFlowRate =
+ 120.0*volFlowRate/pow3(constant::mathematical::pi)/pow3(dm_);
+ }
+
// Pressure drop for this flow rate
- const scalar pdFan = fanCurve_(max(volFlowRate, 0.0));
+ scalar pdFan = fanCurve_(max(volFlowRate, 0.0));
+
+ if (nonDimensional_)
+ {
+ // Convert the adimensional deltap from curve into deltaP
+ pdFan = pdFan*pow4(constant::mathematical::pi)*rpm_*sqr(dm_)/1800;
+ }
totalPressureFvPatchScalarField::updateCoeffs
(
@@ -173,6 +207,10 @@ void Foam::fanPressureFvPatchScalarField::write(Ostream& os) const
fanCurve_.write(os);
os.writeKeyword("direction")
<< fanFlowDirectionNames_[direction_] << token::END_STATEMENT << nl;
+ os.writeKeyword("nonDimensional") << nonDimensional_
+ << token::END_STATEMENT << nl;
+ os.writeEntry("rpm", rpm_);
+ os.writeEntry("dm", dm_);
}
diff --git a/src/finiteVolume/fields/fvPatchFields/derived/fanPressure/fanPressureFvPatchScalarField.H b/src/finiteVolume/fields/fvPatchFields/derived/fanPressure/fanPressureFvPatchScalarField.H
index aa4b19f28b81caf81d591330afa3d343ce0cd860..e8744b192c90240e0f15e742d396b485bd44b744 100644
--- a/src/finiteVolume/fields/fvPatchFields/derived/fanPressure/fanPressureFvPatchScalarField.H
+++ b/src/finiteVolume/fields/fvPatchFields/derived/fanPressure/fanPressureFvPatchScalarField.H
@@ -3,7 +3,7 @@
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2011-2016 OpenFOAM Foundation
- \\/ M anipulation |
+ \\/ M anipulation | Copyright (C) 2017 OpenCFD Ltd
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@@ -31,6 +31,24 @@ Description
This boundary condition can be applied to assign either a pressure inlet
or outlet total pressure condition for a fan.
+ The switch nonDimensional can be used for a non-dimensional table. It needs
+ inputs rpm and dm of the fan.
+
+ The nonDimensional flux for the table is calculate as :
+
+ phi = 4.0*mDot/(rho*sqr(PI)*dm^3*omega)
+ where:
+ dm is the mean diameter.
+ omega is rad/sec.
+
+ The nonDimensinal pressure :
+
+ Psi = 2 deltaP/(rho*(sqr(PI*omega*dm)))
+ where:
+ deltaP is the pressure drop
+
+ The non-dimensional table should be given as Psi = F(phi).
+
Usage
\table
Property | Description | Required | Default value
@@ -38,6 +56,9 @@ Usage
outOfBounds | out of bounds handling | yes |
direction | direction of flow through fan [in/out] | yes |
p0 | environmental total pressure | yes |
+ nonDimensional | uses non-dimensional table | no | false
+ rpm | fan rpm for non-dimensional table | no | 0.0
+ dm | mean diameter for non-dimensional table | no | 0.0
\endtable
Example of the boundary condition specification:
@@ -116,6 +137,17 @@ private:
//- Direction of flow through the fan relative to patch
fanFlowDirection direction_;
+ //- Swtich for using non-dimensional curve
+ Switch nonDimensional_;
+
+ // Parameters for non-dimensional table
+
+ //- Fan rpm
+ scalar rpm_;
+
+ //- Fan mean diameter
+ scalar dm_;
+
public:
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/changeDictionaryDict b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/changeDictionaryDict
index 46208629875248ea9a0723a09c2d3026cd632907..9e4ef1a6b35a0a287a7da91c60270409b0613c29 100644
--- a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/changeDictionaryDict
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/air/changeDictionaryDict
@@ -72,6 +72,7 @@ dictionaryReplacement
qrNbr none;
qr qr;
kappa none;
+ thermalInertia true;
value uniform 300;
}
}
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/changeDictionaryDict b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/changeDictionaryDict
index 3860f7dc3fcc24b619a2f3a19ac13d94d2d8e0ef..1b15cfcc0613b25b41d073917a7e77771830fbb1 100644
--- a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/changeDictionaryDict
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/floor/changeDictionaryDict
@@ -43,6 +43,7 @@ dictionaryReplacement
qrNbr none;
qr none;
kappa none;
+ thermalInertia true;
value uniform 300;
}
@@ -54,6 +55,7 @@ dictionaryReplacement
qrNbr qr;
qr none;
kappa none;
+ thermalInertia true;
value uniform 300;
}
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/changeDictionaryDict b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/changeDictionaryDict
index 080b5fba86def0d2b8101ace168d0f0e7217dfbb..4c0e93ace8af2683d28905180d4f5530baefca21 100644
--- a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/changeDictionaryDict
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/system/solid/changeDictionaryDict
@@ -37,6 +37,7 @@ dictionaryReplacement
qrNbr qr;
qr none;
kappa none;
+ thermalInertia true;
value uniform 300;
}
@@ -48,6 +49,7 @@ dictionaryReplacement
qrNbr none;
qr none;
kappa none;
+ thermalInertia true;
value uniform 300;
}