buffalo_panel.views.LineDoubletConstant2DView

class buffalo_panel.views.LineDoubletConstant2DView(geometry, local_coefficients, top=True)[source]

Bases: LineFamily2DView[LinePanelGeometry2D]

Field view for one constant-strength doublet line panel.

The view evaluates the velocity, potential, and stream-function contribution from one geometry panel with one doublet strength. It is intended for diagnostics, visualization, and kernel-level demonstrations rather than solver assembly.

Methods

`field_at`(x, y)	Evaluate velocity, potential, and stream function together.
`potential_at`(x, y)	Evaluate induced velocity potential at field points.
`stream_function_at`(x, y)	Evaluate induced stream function at field points.
`velocity_at`(x, y)	Evaluate induced velocity at field points.

Attributes

`family`	Element family defining panel ownership and local coefficient layout.
`geometry`	Geometry containing the family source panels.
`kernel`	Kernel used to evaluate unit constant-doublet influence values.
`local_coefficients`	Solved or user-specified family-local coefficients.
`top`	Branch-side convention for points on panel cuts.

field_at(x, y)

Evaluate velocity, potential, and stream function together.

Parameters:

x (FloatInput) – Field-point x-coordinates.
y (FloatInput) – Field-point y-coordinates.

Returns:

FloatArray – Global x-velocity contribution.
FloatArray – Global y-velocity contribution.
FloatArray – Velocity potential contribution.
FloatArray – Stream-function contribution.

Return type:

tuple[TypeAliasForwardRef(’buffalo_panel.type_aliases.FloatArray’), TypeAliasForwardRef(’buffalo_panel.type_aliases.FloatArray’), TypeAliasForwardRef(’buffalo_panel.type_aliases.FloatArray’), TypeAliasForwardRef(’buffalo_panel.type_aliases.FloatArray’)]

geometry: GeometryT: Geometry containing the family source panels.

local_coefficients: FloatInput: Solved or user-specified family-local coefficients.

potential_at(x, y)

Evaluate induced velocity potential at field points.

Parameters:

x (FloatInput) – Field-point x-coordinates.
y (FloatInput) – Field-point y-coordinates.

Returns:

Velocity potential contribution with the broadcast input shape.

Return type:

FloatArray

stream_function_at(x, y)

Evaluate induced stream function at field points.

Parameters:

x (FloatInput) – Field-point x-coordinates.
y (FloatInput) – Field-point y-coordinates.

Returns:

Stream-function contribution with the broadcast input shape.

Return type:

FloatArray

top: bool: Branch-side convention for points on panel cuts.

velocity_at(x, y)

Evaluate induced velocity at field points.

Parameters:

x (FloatInput) – Field-point x-coordinates.
y (FloatInput) – Field-point y-coordinates.

Returns:

FloatArray – Global x-velocity contribution with the broadcast input shape.
FloatArray – Global y-velocity contribution with the broadcast input shape.

Return type:

tuple[TypeAliasForwardRef(’buffalo_panel.type_aliases.FloatArray’), TypeAliasForwardRef(’buffalo_panel.type_aliases.FloatArray’)]

kernel: LineDoubletConstant2D: Kernel used to evaluate unit constant-doublet influence values.

family: ElementFamily: Element family defining panel ownership and local coefficient layout.