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 = (
  ...         f"{OMEGA[1]} * (z - {CENTER[2]}) - {OMEGA[2]} * (y - {CENTER[1]})",
  ...         f"{OMEGA[2]} * (x - {CENTER[0]}) - {OMEGA[0]} * (z - {CENTER[2]})",
  ...         f"{OMEGA[0]} * (y - {CENTER[1]}) - {OMEGA[1]} * (x - {CENTER[0]})",
  ...     ),
  ...     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),
  ... )
  

---

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: 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 tangential velocity 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.

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

List of boundaries with boundary condition imposed.