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sorptionWallFunctionFvPatchScalarField Class Reference
Turbulence models » Boundary conditions » Wall functions

The sorptionWallFunction is a wall boundary condition to specify scalar/concentration gradient for turbulent and laminar flows. More...

#include <sorptionWallFunctionFvPatchScalarField.H>

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Public Member Functions

 TypeName ("sorptionWallFunction")
 Runtime type information.
 sorptionWallFunctionFvPatchScalarField (const fvPatch &, const DimensionedField< scalar, volMesh > &)
 Construct from patch and internal field.
 sorptionWallFunctionFvPatchScalarField (const fvPatch &, const DimensionedField< scalar, volMesh > &, const dictionary &)
 Construct from patch, internal field and dictionary.
 sorptionWallFunctionFvPatchScalarField (const sorptionWallFunctionFvPatchScalarField &, const fvPatch &, const DimensionedField< scalar, volMesh > &, const fvPatchFieldMapper &)
 Construct by mapping given sorptionWallFunctionFvPatchScalarField onto a new patch.
 sorptionWallFunctionFvPatchScalarField (const sorptionWallFunctionFvPatchScalarField &)
 Construct as copy.
 sorptionWallFunctionFvPatchScalarField (const sorptionWallFunctionFvPatchScalarField &, const DimensionedField< scalar, volMesh > &)
 Construct as copy setting internal field reference.
virtual tmp< fvPatchField< scalar > > clone () const
 Return a clone.
virtual tmp< fvPatchField< scalar > > clone (const DimensionedField< scalar, volMesh > &iF) const
 Clone with an internal field reference.
virtual void autoMap (const fvPatchFieldMapper &)
 Map (and resize as needed) from self given a mapping object.
virtual void rmap (const fvPatchScalarField &, const labelList &)
 Reverse map the given fvPatchField onto this fvPatchField.
virtual void updateCoeffs ()
 Update the coefficients associated with the patch field.
virtual void write (Ostream &) const
 Write.

Detailed Description

The sorptionWallFunction is a wall boundary condition to specify scalar/concentration gradient for turbulent and laminar flows.

The governing equation of the boundary condition is:

\‍[ \nabla C = \frac{C^* - C_p}{\Delta_y} = \frac{F}{a \Delta_y} \‍]

with

\‍[ C^* = \frac{C_{surf}}{K} \‍]

and with the mass-transfer coefficient is calculated for turbulent flows

\‍[ a = \frac{C_\mu^{0.25} k_p^{0.5}}{y^+_{blended}} \‍]

or for laminar-flow and molecular-diffusion-only states

\‍[ a = \frac{D_m}{y_1} \‍]

where

$ \nabla C $=Gradient of concentration
$ C^* $=Wall-adjacent concentration
$ C_p $=Near-wall cell concentration
$ \Delta_y $=First-cell centre wall distance
$ F $=Flux of concentration
$ a $=Mass-transfer coefficient
$ C_{surf} $=Wall-surface concentration
$ K $=Adsorption or absorption/permeation coefficient
$ C_\mu $=Empirical model coefficient
$ k_p $=Turbulent kinetic energy in near-wall cell
$ y^+_{blended} $=Non-dimensional blended near-wall cell height
$ D_m $=Molecular-diffusion coefficient
$ y_1 $=First-cell centre wall distance

Required fields: 

      x    | Arbitrary scalar field, e.g. species, passive scalars etc.

Reference: 

        Standard model for exponential blending (tag:FDC):
            Foat, T., Drodge, J., Charleson, A., Whatmore, B.,
            Pownall, S., Glover, P., ... & Marr, A. (2022).
            Predicting vapour transport from semi-volatile organic
            compounds concealed within permeable packaging.
            International Journal of Heat and Mass Transfer, 183, 122012.
            DOI:10.1016/j.ijheatmasstransfer.2021.122012

        Standard model for stepwise blending (tag:F):
            Foat, T. (2021).
            Modelling vapour transport in indoor environments for
            improved detection of explosives using dogs.
            Doctoral dissertation. University of Southampton.
            URI:http://eprints.soton.ac.uk/id/eprint/456709
Usage
Example of the boundary condition specification: 
<patchName>
{
    // Mandatory entries
    type            sorptionWallFunction;
    Sc              <scalar>;
    Sct             <scalar>;
    kAbs            <PatchFunction1<scalar>>;

    // Optional entries
    laminar         <bool>;
    D               <scalar>;
    kName           <word>;
    nuName          <word>;

    // Inherited entries
    Cmu             <scalar>;
    kappa           <scalar>;
    E               <scalar>;
    blending        <word>;
    ...
}

where the entries mean:

Property Description Type Reqd Deflt
type Type name: sorptionWallFunction word yes -
Sc Schmidt number scalar yes -
Sct Turbulent Schmidt number scalar yes -
kAbs Adsorption or absorption/permeation coefficient PatchFunction1<scalar> yes -
laminar Flag to calculate mass-transfer coefficient under the laminar-flow or molecular-diffusion-only states bool no false
kName Name of operand turbulent kinetic energy field word no k
nuName Name of operand kinematic viscosity field word no nu

The inherited entries are elaborated in:

Source files

Definition at line 271 of file sorptionWallFunctionFvPatchScalarField.H.

Constructor & Destructor Documentation

◆ sorptionWallFunctionFvPatchScalarField() [1/5]

sorptionWallFunctionFvPatchScalarField ( const fvPatch & p,
const DimensionedField< scalar, volMesh > & iF )

Construct from patch and internal field.

Definition at line 262 of file sorptionWallFunctionFvPatchScalarField.C.

References p, and wallFunctionBlenders::wallFunctionBlenders().

Referenced by sorptionWallFunctionFvPatchScalarField(), sorptionWallFunctionFvPatchScalarField(), sorptionWallFunctionFvPatchScalarField(), and TypeName().

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◆ sorptionWallFunctionFvPatchScalarField() [2/5]

sorptionWallFunctionFvPatchScalarField ( const fvPatch & p,
const DimensionedField< scalar, volMesh > & iF,
const dictionary & dict )

Construct from patch, internal field and dictionary.

Definition at line 302 of file sorptionWallFunctionFvPatchScalarField.C.

References dict, Foam::exit(), Foam::FatalIOError, FatalIOErrorInFunction, Foam::New(), p, wallFunctionBlenders::STEPWISE, wallFunctionBlenders::wallFunctionBlenders(), and Foam::Zero.

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◆ sorptionWallFunctionFvPatchScalarField() [3/5]

sorptionWallFunctionFvPatchScalarField ( const sorptionWallFunctionFvPatchScalarField & ptf,
const fvPatch & p,
const DimensionedField< scalar, volMesh > & iF,
const fvPatchFieldMapper & mapper )

Construct by mapping given sorptionWallFunctionFvPatchScalarField onto a new patch.

Definition at line 281 of file sorptionWallFunctionFvPatchScalarField.C.

References clone(), p, sorptionWallFunctionFvPatchScalarField(), and wallFunctionBlenders::wallFunctionBlenders().

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◆ sorptionWallFunctionFvPatchScalarField() [4/5]

sorptionWallFunctionFvPatchScalarField ( const sorptionWallFunctionFvPatchScalarField & swfpsf)

Construct as copy.

Definition at line 346 of file sorptionWallFunctionFvPatchScalarField.C.

References clone(), sorptionWallFunctionFvPatchScalarField(), and wallFunctionBlenders::wallFunctionBlenders().

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◆ sorptionWallFunctionFvPatchScalarField() [5/5]

sorptionWallFunctionFvPatchScalarField ( const sorptionWallFunctionFvPatchScalarField & swfpsf,
const DimensionedField< scalar, volMesh > & iF )

Construct as copy setting internal field reference.

Definition at line 364 of file sorptionWallFunctionFvPatchScalarField.C.

References clone(), sorptionWallFunctionFvPatchScalarField(), and wallFunctionBlenders::wallFunctionBlenders().

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Member Function Documentation

◆ TypeName()

TypeName ( "sorptionWallFunction" )

Runtime type information.

References sorptionWallFunctionFvPatchScalarField().

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◆ clone() [1/2]

virtual tmp< fvPatchField< scalar > > clone ( ) const
inlinevirtual

Return a clone.

Definition at line 399 of file sorptionWallFunctionFvPatchScalarField.H.

References fvPatchField< Type >::Clone().

Referenced by sorptionWallFunctionFvPatchScalarField(), sorptionWallFunctionFvPatchScalarField(), and sorptionWallFunctionFvPatchScalarField().

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◆ clone() [2/2]

virtual tmp< fvPatchField< scalar > > clone ( const DimensionedField< scalar, volMesh > & iF) const
inlinevirtual

Clone with an internal field reference.

Definition at line 407 of file sorptionWallFunctionFvPatchScalarField.H.

References fvPatchField< Type >::Clone().

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◆ autoMap()

void autoMap ( const fvPatchFieldMapper & mapper)
virtual

Map (and resize as needed) from self given a mapping object.

Definition at line 385 of file sorptionWallFunctionFvPatchScalarField.C.

◆ rmap()

void rmap ( const fvPatchScalarField & ptf,
const labelList & addr )
virtual

Reverse map the given fvPatchField onto this fvPatchField.

Definition at line 399 of file sorptionWallFunctionFvPatchScalarField.C.

References Foam::refCast().

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◆ updateCoeffs()

void updateCoeffs ( )
virtual

Update the coefficients associated with the patch field.

Definition at line 417 of file sorptionWallFunctionFvPatchScalarField.C.

◆ write()

void write ( Ostream & os) const
virtual

Write.

Definition at line 430 of file sorptionWallFunctionFvPatchScalarField.C.

References os(), fixedGradientFvPatchField< Type >::write(), and fvPatchField< Type >::writeValueEntry().

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The documentation for this class was generated from the following files: