BiharmonicFriction

class fridom.shallowwater.modules.closures.diffusion.BiharmonicFriction(ah: float | ScalarField)

Bases: BiharmonicDiffusion

Biharmonic friction module.

Description

Applies the harmonic diffusion operator \(\mathcal{B}\) (see fridom.framework.modules.closures.BiharmonicDiffusion) to all fields with the flag “ENABLE_FRICTION” (typically the velocity field).

Parameters

ahfloat | fr.ScalarField

Horizontal friction coefficient.

__init__(ah: float | ScalarField) → None

Methods

__init__(ah)
diffuse(z, dz)
diffusion_operator(u)	Apply the biharmonic diffusion operator on a scalar field \(u\).
disable()	Disable the module.
enable()	Enable the module.
is_enabled()	Whether the module is enabled or not.
reset()	Stop and start the module.
setup(mset[, setup_mode])	Set the module up.
start()	Start the module.
stop()	Stop the module.
update(mz)	Update the model state.

Attributes

ah	The horizontal diffusion coefficient.
diff_module	The differentiation module to be used by this module.
diffusion_coefficients	A list of diffusion coefficients.
field_flags	A list of field flags that indicate which fields should be diffused.
grid	The grid of the model settings.
info	Return a dictionary with information about the time stepper.
interp_module	The interpolation module to be used by this module.
is_setup	Whether the module is set up.
mset	The model settings.
name
required_halo	The required halo points for this module.

Examples using fridom.shallowwater.modules.closures.BiharmonicFriction

Barotropic Instability.

Barotropic Instability.

name = 'Biharmonic Friction'

property ah: float | ScalarField

The horizontal diffusion coefficient.