This velocity boundary condition simulates the opening of a baffle due to local flow conditions, by merging the behaviours of wall and cyclic conditions. The baffle joins two mesh regions, where the open fraction determines the interpolation weights applied to each cyclic- and neighbour-patch contribution. More...
Public Member Functions | |
TypeName ("activeBaffleVelocity") | |
Runtime type information. More... | |
activeBaffleVelocityFvPatchVectorField (const fvPatch &, const DimensionedField< vector, volMesh > &) | |
Construct from patch and internal field. More... | |
activeBaffleVelocityFvPatchVectorField (const fvPatch &, const DimensionedField< vector, volMesh > &, const dictionary &) | |
Construct from patch, internal field and dictionary. More... | |
activeBaffleVelocityFvPatchVectorField (const activeBaffleVelocityFvPatchVectorField &, const fvPatch &, const DimensionedField< vector, volMesh > &, const fvPatchFieldMapper &) | |
Construct by mapping given activeBaffleVelocityFvPatchVectorField. More... | |
activeBaffleVelocityFvPatchVectorField (const activeBaffleVelocityFvPatchVectorField &) | |
Construct as copy. More... | |
activeBaffleVelocityFvPatchVectorField (const activeBaffleVelocityFvPatchVectorField &, const DimensionedField< vector, volMesh > &) | |
Construct as copy setting internal field reference. More... | |
virtual tmp< fvPatchField< vector > > | clone () const |
Return a clone. More... | |
virtual tmp< fvPatchField< vector > > | clone (const DimensionedField< vector, volMesh > &iF) const |
Clone with an internal field reference. More... | |
virtual void | autoMap (const fvPatchFieldMapper &) |
Map (and resize as needed) from self given a mapping object. More... | |
virtual void | rmap (const fvPatchVectorField &, const labelList &) |
Reverse map the given fvPatchField onto this fvPatchField. More... | |
virtual void | updateCoeffs () |
Update the coefficients associated with the patch field. More... | |
virtual void | write (Ostream &) const |
Write. More... | |
This velocity boundary condition simulates the opening of a baffle due to local flow conditions, by merging the behaviours of wall and cyclic conditions. The baffle joins two mesh regions, where the open fraction determines the interpolation weights applied to each cyclic- and neighbour-patch contribution.
We determine whether the baffle is opening or closing from the sign of the net force across the baffle, from which the baffle open fraction is updated using:
where
= | baffle open fraction [0-1] | |
= | baffle open fraction on previous evaluation | |
= | simulation time step | |
= | time taken to open the baffle | |
= | net force across the baffle |
The open fraction is then applied to scale the patch areas.
Property | Description | Required | Default value |
---|---|---|---|
p | pressure field name | no | p |
cyclicPatch | cylclic patch name | yes | |
orientation | 1 or -1 used to switch flow direction | yes | |
openFraction | current opatch open fraction [0-1] | yes | |
openingTime | time taken to open the baffle | yes | |
maxOpenFractionDelta | max open fraction change per timestep | yes |
Example of the boundary condition specification:
<patchName> { type activeBaffleVelocity; p p; cyclicPatch cyclic1; orientation 1; openFraction 0.2; openingTime 5.0; maxOpenFractionDelta 0.1; }
Definition at line 158 of file activeBaffleVelocityFvPatchVectorField.H.
activeBaffleVelocityFvPatchVectorField | ( | const fvPatch & | p, |
const DimensionedField< vector, volMesh > & | iF | ||
) |
Construct from patch and internal field.
Definition at line 32 of file activeBaffleVelocityFvPatchVectorField.C.
activeBaffleVelocityFvPatchVectorField | ( | const fvPatch & | p, |
const DimensionedField< vector, volMesh > & | iF, | ||
const dictionary & | dict | ||
) |
Construct from patch, internal field and dictionary.
Definition at line 78 of file activeBaffleVelocityFvPatchVectorField.C.
References Foam::Zero.
activeBaffleVelocityFvPatchVectorField | ( | const activeBaffleVelocityFvPatchVectorField & | ptf, |
const fvPatch & | p, | ||
const DimensionedField< vector, volMesh > & | iF, | ||
const fvPatchFieldMapper & | mapper | ||
) |
Construct by mapping given activeBaffleVelocityFvPatchVectorField.
onto a new patch
Definition at line 54 of file activeBaffleVelocityFvPatchVectorField.C.
Construct as copy.
Definition at line 110 of file activeBaffleVelocityFvPatchVectorField.C.
activeBaffleVelocityFvPatchVectorField | ( | const activeBaffleVelocityFvPatchVectorField & | ptf, |
const DimensionedField< vector, volMesh > & | iF | ||
) |
Construct as copy setting internal field reference.
Definition at line 131 of file activeBaffleVelocityFvPatchVectorField.C.
TypeName | ( | "activeBaffleVelocity" | ) |
Runtime type information.
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inlinevirtual |
Return a clone.
Definition at line 286 of file activeBaffleVelocityFvPatchVectorField.H.
References fvPatchField< Type >::Clone().
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inlinevirtual |
Clone with an internal field reference.
Definition at line 295 of file activeBaffleVelocityFvPatchVectorField.H.
References fvPatchField< Type >::Clone().
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virtual |
Map (and resize as needed) from self given a mapping object.
Note: cannot map field from cyclic patch anyway so just recalculate
Areas should be consistent when doing autoMap except in case of topo changes. Note: we don't want to use Sf here since triggers rebuilding of fvMesh::S() which will give problems when mapped (since already on new mesh)
Definition at line 154 of file activeBaffleVelocityFvPatchVectorField.C.
References Foam::foamVersion::patch.
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virtual |
Reverse map the given fvPatchField onto this fvPatchField.
Definition at line 186 of file activeBaffleVelocityFvPatchVectorField.C.
References Foam::foamVersion::patch.
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virtual |
Update the coefficients associated with the patch field.
Definition at line 210 of file activeBaffleVelocityFvPatchVectorField.C.
References Foam::clamp(), Foam::constant::electromagnetic::e, Foam::endl(), polyPatch::faceCells(), forAll, Foam::Info, Foam::mag(), fvPatch::magSf(), Foam::min(), p, Foam::foamVersion::patch, fvPatch::patch(), fvPatch::Sf(), Foam::sign(), and timeIndex.
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virtual |
Write.
Definition at line 288 of file activeBaffleVelocityFvPatchVectorField.C.
References os(), fvPatchField< Type >::write(), Ostream::writeEntry(), Ostream::writeEntryIfDifferent(), and fvPatchField< Type >::writeValueEntry().