Boundaries
Devito
- class stride.physics.boundaries.devito.SpongeBoundary2(grid)[source]
Bases:
stride.physics.boundaries.boundary.Boundary
Sponge boundary layer for a second-order equation as proposed in https://doi.org/10.1088/1742-2140/aaa4da.
- class stride.physics.boundaries.devito.ComplexFrequencyShiftPML2(grid)[source]
Bases:
stride.physics.boundaries.boundary.Boundary
Complex frequency shift PML for a second-order equation as presented in https://doi.org/10.1121/1.4938270.
Base
- class stride.physics.boundaries.boundary.Boundary(grid)[source]
Bases:
abc.ABC
Base class for Boundaries that can be applied to the different problem types.
- Parameters
grid (DevitoGrid) –
- abstract apply(*args, **kwargs)[source]
Generate the necessary pieces to make the boundary work.
- Returns
term – Any extra terms to add to the equations.
list – Equations to execute before the state equation.
list – Equations to execute after the state equation.
- damping(dimensions=None, damping_coefficient=None, mask=False, damping_type='sine', velocity=1.0, power_degree=2, reflection_coefficient=0.001, assign=False)[source]
Create a damping field based on the dimensions of the grid.
- Parameters
dimensions (tuple of ints, optional) – Whether or not to fill only certain dimensions, defaults to
None
, all dimensions.damping_coefficient (float, optional) – Value of the maximum damping of the field.
mask (bool, optional) – Create the damping layer as a mask (interior filled with ones) or not (interior filled with zeros).
damping_type (str, optional) – Expression to be used for the shape of the damping function, defaults to
sine
.velocity (ndarray or float, optional) – Velocity in the boundary region, defaults to 1.0.
power_degree (int, optional) – Degree of the power to use for
power
damping, defaults to 2.reflection_coefficient (float, optional) – Theoretical reflection coefficient of the layer, defaults to 1e-3.
assign (bool, optional) – Whether to assign or sum the value at each location, defaults to
False
.
- Returns
Tensor containing the damping field.
- Return type
ndarray