flow360.Wall

class Wall

Bases: BoundaryBase

Wall class defines the wall boundary condition based on the inputs.

Example

• Wall with wall function and prescribed velocity:

  >>> fl.Wall(
  ...     entities=geometry["wall_function"],
  ...     velocity = ["min(0.2, 0.2 + 0.2*y/0.5)", "0", "0.1*y/0.5"],
  ...     use_wall_function=True,
  ... )
  

  >>> fl.Wall(
  ...     entities=volume_mesh["8"],
  ...     velocity=WallRotation(
  ...       axis=(0, 0, 1),
  ...       center=(1, 2, 3) * u.m,
  ...       angular_velocity=100 * u.rpm
  ...     ),
  ...     use_wall_function=True,
  ... )
  

• Define isothermal wall boundary condition on entities with the naming pattern "fluid/isothermal-*":

  >>> fl.Wall(
  ...     entities=volume_mesh["fluid/isothermal-*"],
  ...     heat_spec=fl.Temperature(350 * fl.u.K),
  ... )
  

• Define isoflux wall boundary condition on entities with the naming pattern "solid/isoflux-*":

  >>> fl.Wall(
  ...     entities=volume_mesh["solid/isoflux-*"],
  ...     heat_spec=fl.HeatFlux(1.0 * fl.u.W/fl.u.m**2),
  ... )
  

• Define Slater no-slip bleed model on entities with the naming pattern "fluid/SlaterBoundary-*":

  >>> fl.Wall(
  ...     entities=volume_mesh["fluid/SlaterBoundary-*"],
  ...     velocity=fl.SlaterPorousBleed(
  ...         static_pressure=1.01e6 * fl.u.Pa, porosity=0.4, activation_step=200
  ...     ),
  ... )
  

---

name: str | None = 'Wall'

Name of the Wall boundary condition.

type: Literal['Wall'] = 'Wall'

use_wall_function: bool = False

Specify if use wall functions to estimate the velocity field close to the solid boundaries.

velocity: Annotated[SlaterPorousBleed | WallRotation, FieldInfo(annotation=NoneType, required=True, discriminator='type_name')] | Tuple[Annotated[str, AfterValidator(func=process_expressions)], Annotated[str, AfterValidator(func=process_expressions)], Annotated[str, AfterValidator(func=process_expressions)]] | Annotated[_VectorType, PlainSerializer(func=_dimensioned_type_serializer, return_type=PydanticUndefined, when_used=always)] | None = None

Prescribe a velocity or the velocity model on the wall.

heat_spec: HeatFlux | Temperature = HeatFlux(value=unyt_quantity(0., 'W/m**2'), type_name='HeatFlux')

Specify the heat flux or temperature at the Wall boundary.

roughness_height: Annotated[_Constrained, PlainSerializer(func=_dimensioned_type_serializer, return_type=PydanticUndefined, when_used=always)] = unyt_quantity(0, 'm')

Equivalent sand grain roughness height. Available only to Fluid zone boundaries.

Constraints:

• func = <function _dimensioned_type_serializer at 0x70391099c040>

• return_type = PydanticUndefined

• when_used = always

entities: EntityList[Surface] [Required] (alias 'surfaces')

List of boundaries with boundary condition imposed.