Smooth Transition Controller

class pyrefine.controller.smooth_transition.ControllerSmoothTransition(project_name, pbs=None)

Bases: ControllerBase

A controller to smoothly transition between complexity levels instead of increasing the complexity by complexity_multiplier over a single adaptation cycle. This smoother transition can help maintain solver robustness on cases where flow features like shocks may move as the mesh refines.

An example of the complexity schedule with the default parameters of steps_per_complexity=5, complexity_multiplier=2, and steps_per_transition = 4: the first 5 steps will have the initial complexity. Over the next 4 steps, the complexity will gradually increase. For step 10, the complexity will be double the initial complexity. This pattern of 5 fixed complexity steps and doubling over 4 transition steps will continue until the adaptation is stopped.

Parameters

  • project_name (str) – The root name of the project (without any mesh numbers)

  • pbs (PBS) – PBS queue helper

steps_per_complexity

The number of meshes at constant complexity.

Type

int

complexity_multiplier

The multiplicative factor to mutiple the complexity by

Type

float

steps_per_transition

The number of meshes used to transition to the next complexity

Type

int

compute_complexity(istep, current_complexity)
Parameters

  • istep (int) – Adaptation step number

  • current_complexity (float) – The current complexity in the driver. If doing a restart, the current complexity will be None

Return type

complexity