tud_lbm.operators.step
======================

.. py:module:: tud_lbm.operators.step

.. autoapi-nested-parse::

   Step operators — implementations of update_timestep protocols.

   Public API: build_step_fn()

   Implementation modules (_single_phase.py, _multiphase.py, _multiphase_wetting.py) are internal;
   use the factory to access. Helper modules (_common.py) provide shared logic.

   .. rubric:: Example

   from tud_lbm.operators.step import build_step_fn

   step = build_step_fn("single_phase")
   new_state = step(setup, state)



Functions
---------

.. autoapisummary::

   tud_lbm.operators.step.build_step_fn


Package Contents
----------------

.. py:function:: build_step_fn(scheme: str = 'single_phase') -> tud_lbm.operators.protocols.StepOperator

   Return a step operator looked up from the registry.

   :param scheme: Step operator name ("single_phase", "multiphase", "multiphase_wetting").
                  Defaults to "single_phase".

   :returns: A callable satisfying the StepOperator protocol,
             registered under the "update_timestep" kind.

   :raises ValueError: If scheme is not registered.

   .. rubric:: Examples

   >>> from tud_lbm.operators.step import build_step_fn
   >>> step = build_step_fn("single_phase")
   >>> new_state = step(setup, state)