Description🔗
The speciesSorption
is a boundary condition that provides
a first-order zero-gradient condition for a given scalar field to
model time-dependent adsorption-desorption processes.
where:
Property | Description |
---|---|
\(c_{eq}\) | Equilibrium concentration |
\(c_{abs}\) | Absorbed at wall |
\(k_{ads}\) | Adsorption rate constant [1/s] |
where:
Property | Description |
---|---|
\(c_{max}\) | Maximum concentration |
\(k_l\) | Langmuir constant |
\(c_{int}\) | Local cell value concentration |
Usage🔗
The condition requires entries in both the boundary and field files.
Boundary file🔗
<patchName>
{
type patch;
...
}
Field file🔗
<patchName>
{
// Mandatory entries
type speciesSorption;
equilibriumModel <word>;
kinematicModel <word>;
kabs <scalar>;
kl <scalar>;
max <scalar>;
thickness <PatchFunction1<scalar>>;
rhoS <scalar>;
// Optional entries
dfldp <scalarField>;
mass <scalarField>;
pName <word>;
// Inherited entries
...
}
where:
Property | Description | Type | Required | Default |
---|---|---|---|---|
type |
Type name: speciesSorption
|
word | yes | - |
equilibriumModel |
Equilibrium model | word | yes | - |
kinematicModel |
Kinematic model | word | yes | - |
kabs |
Adsorption rate constant [1/s] | scalar | yes | - |
kl |
Langmuir constant [1/Pa] | scalar | yes | - |
max |
Maximum concentation at wall [mol/kg] | scalar | yes | - |
thickness |
Solid thickness along the patch | PatchFunction1<scalar> | yes | - |
rhoS |
Solid density | scalar | yes | - |
dfldp |
Source on cells next to patch | scalarField | no | Zero |
mass |
Absorbed mass per kg of absorbent [mol/kg] | scalarField | no | Zero |
pName |
Name of operand pressure field | word | no | p |
Options for the equilibriumModel
entry:
Property | Description |
---|---|
Langmuir |
Langmuir model |
Options for the kinematicModel
entry:
Property | Description |
---|---|
PseudoFirstOrder |
Pseudo first-order model |
The inherited entries are elaborated in:
- zeroGradientFvPatchFields.H
- PatchFunction1.H
- boundarySourcePatch.H
Further information🔗
Tutorial:
Source code:
API:
History:
- Introduced in version v2112