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ENH: user-specified ref temperature for externalCoupled mixed T BC (#1072)
- Uses the user-specified value for the HTC calculation
{
type externalCoupledTemperature;
outputTemperture fluid; // or wall;
htcRefTemperature user; // or cell (default)
Tref 293.15;
}
This commit is contained in:
Mark Olesen
@ -3,7 +3,7 @@
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 2013-2016 OpenFOAM Foundation
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\\/ M anipulation | Copyright (C) 2017-2018 OpenCFD Ltd.
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\\/ M anipulation | Copyright (C) 2017-2019 OpenCFD Ltd.
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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@ -44,6 +44,18 @@ Foam::externalCoupledTemperatureMixedFvPatchScalarField::outputTemperatureNames
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});
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const Foam::Enum
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<
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Foam::externalCoupledTemperatureMixedFvPatchScalarField::
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refTemperatureType
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>
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Foam::externalCoupledTemperatureMixedFvPatchScalarField::refTemperatureNames
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({
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{ refTemperatureType::CELL, "cell" },
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{ refTemperatureType::USER, "user" },
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});
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// * * * * * * * * * * * * Protected Member Functions * * * * * * * * * * * //
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void Foam::externalCoupledTemperatureMixedFvPatchScalarField::writeHeader
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@ -51,13 +63,13 @@ void Foam::externalCoupledTemperatureMixedFvPatchScalarField::writeHeader
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Ostream& os
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) const
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{
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if (outputTemperature_ == outputTemperatureType::FLUID)
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if (outTempType_ == outputTemperatureType::WALL)
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{
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os << "# Values: area Tfluid qDot htc" << endl;
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os << "# Values: area Twall qDot htc" << endl;
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}
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else
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{
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os << "# Values: area Twall qDot htc" << endl;
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os << "# Values: area Tfluid qDot htc" << endl;
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}
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}
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@ -72,7 +84,9 @@ externalCoupledTemperatureMixedFvPatchScalarField
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)
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:
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externalCoupledMixedFvPatchField<scalar>(p, iF),
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outputTemperature_(outputTemperatureType::WALL)
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outTempType_(outputTemperatureType::WALL),
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refTempType_(refTemperatureType::CELL),
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Tref_(Zero)
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{}
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@ -86,7 +100,9 @@ externalCoupledTemperatureMixedFvPatchScalarField
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)
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:
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externalCoupledMixedFvPatchField<scalar>(ptf, p, iF, mapper),
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outputTemperature_(ptf.outputTemperature_)
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outTempType_(ptf.outTempType_),
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refTempType_(ptf.refTempType_),
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Tref_(ptf.Tref_)
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{}
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@ -100,12 +116,21 @@ externalCoupledTemperatureMixedFvPatchScalarField
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:
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//externalCoupledMixedFvPatchField<scalar>(p, iF, dict)
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externalCoupledMixedFvPatchField<scalar>(p, iF),
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outputTemperature_(outputTemperatureType::WALL)
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outTempType_(outputTemperatureType::WALL),
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refTempType_
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(
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refTemperatureNames.lookupOrDefault
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(
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"htcRefTemperature",
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dict,
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refTemperatureType::CELL
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)
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),
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Tref_(Zero)
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{
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if (dict.found("outputTemperature"))
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{
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outputTemperature_ =
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outputTemperatureNames.get("outputTemperature", dict);
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outTempType_ = outputTemperatureNames.get("outputTemperature", dict);
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}
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else
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{
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@ -116,6 +141,11 @@ externalCoupledTemperatureMixedFvPatchScalarField
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<< endl;
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}
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if (refTempType_ == refTemperatureType::USER)
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{
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Tref_ = dict.get<scalar>("Tref");
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}
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if (dict.found("refValue"))
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{
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// Initialise same way as mixed
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@ -156,7 +186,9 @@ externalCoupledTemperatureMixedFvPatchScalarField
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)
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:
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externalCoupledMixedFvPatchField<scalar>(ecmpf),
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outputTemperature_(ecmpf.outputTemperature_)
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outTempType_(ecmpf.outTempType_),
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refTempType_(ecmpf.refTempType_),
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Tref_(ecmpf.Tref_)
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{}
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@ -168,7 +200,9 @@ externalCoupledTemperatureMixedFvPatchScalarField
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)
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:
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externalCoupledMixedFvPatchField<scalar>(ecmpf, iF),
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outputTemperature_(ecmpf.outputTemperature_)
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outTempType_(ecmpf.outTempType_),
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refTempType_(ecmpf.refTempType_),
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Tref_(ecmpf.Tref_)
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{}
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@ -224,22 +258,36 @@ void Foam::externalCoupledTemperatureMixedFvPatchScalarField::writeData
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}
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// Patch (wall) temperature [K]
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const scalarField& Tp(*this);
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// Wall temperature [K]
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const scalarField& Twall = *this;
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// Fluid temperature [K]
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tmp<scalarField> tfluid;
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if (refTempType_ == refTemperatureType::USER)
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{
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// User-specified reference temperature
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tfluid = tmp<scalarField>::New(size(), Tref_);
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}
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else
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{
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// Near wall cell temperature
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tfluid = patchInternalField();
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}
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const scalarField Tfluid(tfluid);
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// Near wall cell (fluid) temperature [K]
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const scalarField Tc(patchInternalField());
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// Heat transfer coefficient [W/m2/K]
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const scalarField htc(qDot/(Tp - Tc + 1e-3));
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const scalarField htc(qDot/(Twall - Tfluid + 1e-3));
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const Field<scalar>& magSf(this->patch().magSf());
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const Field<scalar>& magSf = this->patch().magSf();
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const UList<scalar>& Tout =
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(
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outputTemperature_ == outputTemperatureType::FLUID
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? Tc
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: Tp
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outTempType_ == outputTemperatureType::FLUID
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? Tfluid
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: Twall
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);
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forAll(patch(), facei)
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@ -285,8 +333,18 @@ void Foam::externalCoupledTemperatureMixedFvPatchScalarField::write
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os.writeEntry
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(
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"outputTemperature",
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outputTemperatureNames[outputTemperature_]
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outputTemperatureNames[outTempType_]
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);
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os.writeEntry
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(
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"htcRefTemperature",
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refTemperatureNames[refTempType_]
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);
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if (refTempType_ == refTemperatureType::USER)
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{
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os.writeEntry("Tref", Tref_);
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}
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}
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@ -3,7 +3,7 @@
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 2013-2016 OpenFOAM Foundation
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\\/ M anipulation | Copyright (C) 2018 OpenCFD Ltd.
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\\/ M anipulation | Copyright (C) 2018-2019 OpenCFD Ltd.
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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@ -81,7 +81,7 @@ Description
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<fileName>.in
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\endverbatim
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... and then re-instate the lock file. The boundary condition will then
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... and then reinstate the lock file. The boundary condition will then
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read the return values, and pass program execution back to OpenFOAM.
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To be used in combination with the functionObjects::externalCoupled
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@ -89,12 +89,12 @@ Description
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Usage
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\table
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Property | Description | Required | Default
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outputTemperature | The output temperature: fluid/wall | yes |
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Property | Description | Required | Default
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outputTemperature | Output temperature: fluid/wall | yes |
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htcRefTemperature | Fluid temperature for htc: cell/user | no | cell
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Tref | Reference temperature [K] for htc | partly |
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\endtable
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Note the
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SeeAlso
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externalCoupledFunctionObject
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mixedFvPatchField
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@ -126,7 +126,7 @@ class externalCoupledTemperatureMixedFvPatchScalarField
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{
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// Data Types
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//- Location for the ouput temperature
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//- Location for the output temperature
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enum outputTemperatureType
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{
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FLUID, //!< Use fluid (cell) temperature
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@ -136,11 +136,27 @@ class externalCoupledTemperatureMixedFvPatchScalarField
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//- Names for outputTemperatureType
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static const Enum<outputTemperatureType> outputTemperatureNames;
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//- Reference temperature type for HTC calculation
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enum refTemperatureType
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{
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CELL, //!< Use cell temperature (default)
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USER //!< User-specified reference temperature
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};
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//- Names for refTemperatureType
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static const Enum<refTemperatureType> refTemperatureNames;
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// Private Data
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//- Location for the ouput temperature
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enum outputTemperatureType outputTemperature_;
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//- Location for the output temperature
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enum outputTemperatureType outTempType_;
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//- Reference temperature type for HTC calculation
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enum refTemperatureType refTempType_;
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//- User-specified reference temperature for HTC calculation
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scalar Tref_;
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public:
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