Solution variable data

A solution variable is an array variable that holds the data for a particular solved field (such as pressure or velocity). You can use solution_variable_info and solution_variable_data objects to access Fluent solution variable info and data respectively.

Accessing solution variable objects

Launch the fluent solver, and make solution variable objects available (for example, by reading case and data files):

>>> import ansys.fluent.core as pyfluent
>>> from ansys.fluent.core import examples
>>> import_filename = examples.download_file("mixing_elbow.msh.h5", "pyfluent/mixing_elbow")
>>> solver = pyfluent.launch_fluent(mode="solver")
>>> solver.file.read(file_type="case", file_name=import_filename)

The solution_variable_info and solution_variable_data objects are attributes of the solver object:

>>> solution_variable_info = solver.solution_variable_info
>>> solution_variable_data = solver.solution_variable_data

Solution variable info

Solution variable metadata information can be accessed via the following solution_variable_info methods:

• get_zones_info for zone information.

• get_variables_info for solution variable information.

Get zone information

You can access zone information by calling the get_zones_info method.

>>> zones_info = solution_variable_info.get_zones_info()
>>> zones_info.domains
['mixture']
>>>
>>> zones_info.zones
['fluid', 'wall', 'symmetry', 'pressure-outlet-7', 'velocity-inlet-6', 'velocity-inlet-5', 'default-interior']
>>>
>>> zone_info = zones_info['wall']
>>>
>>> zone_info
name:wall count: 3630 zone_id:3 zone_type:wall thread_type:Face
>>>
>>> zone_info.name
'wall'
>>>
>>> zone_info.count
3630
>>>
>>> zone_info.zone_id
3
>>>
>>> zone_info.zone_type
'wall'

Get solution variable information

You can request solution variables information for a given domain_name and list of zone_names by calling the get_variables_info method.

>>> wall_fluid_info = solution_variable_info.get_variables_info(zone_names=['wall' , "fluid"], domain_name="mixture")
>>>
>>> wall_fluid_info.solution_variables
['SV_CENTROID', 'SV_D', 'SV_H', 'SV_K', 'SV_P', 'SV_T', 'SV_U', 'SV_V', 'SV_W']
>>>
>>> solution_variable_info_centroid = wall_fluid_info['SV_CENTROID']
>>>
>>> solution_variable_info_centroid
name:SV_CENTROID dimension:3 field_type:<class 'numpy.float64'>
>>>
>>>solution_variable_info_centroid.name
'SV_CENTROID'
>>>
>>>solution_variable_info_centroid.dimension
>>>3
>>>
>>>solution_variable_info_centroid.field_type
<class 'numpy.float64'>

Solution variable data

solution variable data can be extracted and modified via the following solution_variable_data object methods:

• get_data to get solution variable data.

• set_data to set solution variable data.

Get solution variable data

You can request solution variable data for a given domain_name and multiple zone_names by calling the get_data method and passing the particular solution_variable_name.

>>> sv_t_wall_fluid= solution_variable_data.get_data(solution_variable_name="SV_T", zone_names=["fluid", "wall"], domain_name="mixture")
>>>
>>> sv_t_wall_fluid.domain
'mixture'
>>>
>>> sv_t_wall_fluid.zones
['fluid', 'wall']
>>>
>>> fluid_temp = sv_t_wall_fluid['fluid']
>>>
>>> fluid_temp.size
13852
>>>
>>> fluid_temp.dtype
'float64'
>>>
>>> fluid_temp
array([600., 600., 600., ..., 600., 600., 600.])

Set solution variable data

You can set solution variable data for a given domain_name by calling the set_data method and passing required solution_variable_name and dictionary of zone_name to numpy array of solution_variable_data

Additionally solution_variable_data object also supports create_empty_array method. This method can be used to generate numpy zeros array for a given domain_name, zone_name and solution_variable_name. This array can be populated and passed to set_data.

>>> wall_temp_array = solution_variable_data.create_empty_array("SV_T", "wall", "mixture")
>>> fluid_temp_array = solution_variable_data.create_empty_array("SV_T", "fluid", "mixture")
>>> wall_temp_array[:] = 500
>>> fluid_temp_array[:] = 600
>>> zone_names_to_solution_variable_data = {'wall':wall_temp_array, 'fluid':fluid_temp_array}
>>> solution_variable_data.set_data(solution_variable_name="SV_T", zone_names_to_solution_variable_data=zone_names_to_solution_variable_data, domain_name="mixture")

solution_variables.SolutionVariableInfo(service)	Provide access to Fluent SVARs and Zones information.
solution_variables.SolutionVariableData(...)	Provides access to Fluent SVAR data on zones.