File Session#

The FileSession class provides an interface to expose field info and field data from a case and data file.

Sample usage#

You can use the FileSession by passing the case and data file information by using the CaseReader (CaseFile) and DataReader (DataFile). This example shows adding case and data file information to FileSession. Then, field info is extracted followed by adding a transaction request and extracting field data. One can either run a single or multi-phase case. In that respect, the example covers both single and multi-phase cases.

Single phase#

>>> from ansys.fluent.core import examples
>>> from ansys.fluent.core.file_session import FileSession

>>> case_file_name = examples.download_file("elbow1.cas.h5", "pyfluent/file_session")
>>> data_file_name = examples.download_file("elbow1.dat.h5", "pyfluent/file_session")
>>> file_session = FileSession()
>>> file_session.read_case(case_file_name)
>>> file_session.read_data(data_file_name)

>>> file_session.field_info.get_scalar_field_range("SV_T")
[293.1446694544748, 313.1515948109515]
>>> file_session.field_info.get_surfaces_info()
{'wall': {'surface_id': [3],
 'zone_id': -1,
 'zone_type': 'wall',
 'type': 'plane'},
 'symmetry': {'surface_id': [4],
 'zone_id': -1,
 'zone_type': 'wall',
 'type': 'plane'},
  .....
 'default-interior': {'surface_id': [9],
 'zone_id': -1,
 'zone_type': 'wall',
 'type': 'plane'}}
>>> file_session.field_info.get_scalar_fields_info()
{'SV_ARTIFICIAL_WALL_FLAG': {'display_name': 'SV_ARTIFICIAL_WALL_FLAG',
 'section': 'field-data',
 'domain': 'phase-1'},
 'SV_D': {'display_name': 'SV_D',
 'section': 'field-data',
 'domain': 'phase-1'},
 .....
 'SV_WALL_YPLUS_UTAU': {'display_name': 'SV_WALL_YPLUS_UTAU',
 'section': 'field-data',
 'domain': 'phase-1'}}
 >>> file_session.field_info.get_vector_fields_info()
 {'velocity': {'x-component': 'SV_U',
  'y-component': 'SV_V',
  'z-component': 'SV_W'}}
 >>> transaction = file_session.field_data.new_transaction()
 >>> transaction.add_surfaces_request([3, 4])
 >>> transaction.add_scalar_fields_request("SV_T", [3, 4])
 >>> transaction.add_vector_fields_request("velocity", [3, 4])
 >>> transaction.get_fields()
 {(('type', 'scalar-field'),
   ('dataLocation', 1),
   ('boundaryValues',
    False)): {3: {'SV_T': array([293.14999, 293.14999, 293.14999, ..., 293.14999, 293.14999,
           293.14999])}, 4: {'SV_T': array([293.14999, 293.14999, 293.14999, ..., 293.14999, 293.14999,
           293.14999])}},
  (('type',
    'vector-field'),): {3: {'velocity': array([0., 0., 0., ..., 0., 0., 0.]), 'vector-scale': array([0.1])},
   4: {'velocity': array([ 3.32643010e-01,  6.64311343e-03,  0.00000000e+00, ...,
            4.56052223e-01,  2.45034248e-01, -1.24726618e-15]),
    'vector-scale': array([0.1])}},
  (('type',
    'surface-data'),): {3: {'faces': array([   4,    3,    2, ...,  727,  694, 3809], dtype=uint32), 'vertices': array([ 0.        , -0.1016    ,  0.        , ...,  0.00620755,
           -0.19304685,  0.03033731])},
   4: {'faces': array([   4,  295,  294, ...,  265, 1482, 2183], dtype=uint32),
    'vertices': array([ 0.        , -0.1016    ,  0.        , ...,  0.06435075,
           -0.08779959,  0.        ])}}
 >>> from ansys.fluent.core.services.field_data import SurfaceDataType
 >>> file_session.field_data.get_surface_data(SurfaceDataType.Vertices, [3, 4])[3].size
 3810
 >>> file_session.field_data.get_surface_data(SurfaceDataType.Vertices, [3, 4])[3][1500].x
 0.12405861914157867
 >>> file_session.field_data.get_scalar_field_data("SV_T", surface_name="wall").size
 3630
 >>> file_session.field_data.get_scalar_field_data("SV_T", surface_name="wall")[1500].scalar_data
 293.18071329432047
 >>> file_session.field_data.get_vector_field_data("velocity", surface_name="symmetry").size
 2018
 >>> file_session.field_data.get_vector_field_data("velocity", surface_name="symmetry")[1000].x
 0.001690600193527586

Multi phase#

>>> from ansys.fluent.core import examples
>>> from ansys.fluent.core.file_session import FileSession

>>> case_file_name = examples.download_file("mixing_elbow_mul_ph.cas.h5", "pyfluent/file_session")
>>> data_file_name = examples.download_file("mixing_elbow_mul_ph.dat.h5", "pyfluent/file_session")
>>> file_session = FileSession()
>>> file_session.read_case(case_file_name)
>>> file_session.read_data(data_file_name)

>>> file_session.field_info.get_scalar_field_range("phase-2:SV_P")
[0.0, 1.5435200335871788e-11]
>>> file_session.field_info.get_scalar_fields_info()
{'phase-1:SV_ARTIFICIAL_WALL_FLAG': {'display_name': 'SV_ARTIFICIAL_WALL_FLAG',
 'section': 'field-data',
 'domain': 'phase-1'},
 'phase-1:SV_DENSITY': {'display_name': 'SV_DENSITY',
 'section': 'field-data',
 'domain': 'phase-1'},
 .....
 'phase-4:': {'display_name': '',
 'section': 'field-data',
 'domain': 'phase-4'}}
 >>> file_session.field_info.get_vector_fields_info()
 {'phase-1:velocity': {'x-component': 'phase-1: SV_U',
  'y-component': 'phase-1: SV_V',
  'z-component': 'phase-1: SV_W'},
  .....
  'phase-4:velocity': {'x-component': 'phase-4: SV_U',
  'y-component': 'phase-4: SV_V',
  'z-component': 'phase-4: SV_W'}}
 >>> transaction = file_session.field_data.new_transaction()
 >>> transaction.add_scalar_fields_request("phase-1:SV_DENSITY", [30])
 >>> transaction.add_vector_fields_request("phase-1:velocity", [30])
 >>> transaction.get_fields()
 {(('type', 'scalar-field'),
   ('dataLocation', 1),
   ('boundaryValues',
    False)): {30: {'phase-1:SV_DENSITY': array([1.225, .....          1.225])}},
  (('type',
    'vector-field'),): {30: {'phase-1:velocity': array([0., ..... 0.]),
    'vector-scale': array([0.1])}}}
 >>> from ansys.fluent.core.services.field_data import SurfaceDataType
 >>> file_session.field_data.get_surface_data(SurfaceDataType.Vertices, [30])[30].size
 79
 >>> ffile_session.field_data.get_surface_data(SurfaceDataType.Vertices, [30])[30][50].x
 0.14896461503555408
 >>> file_session.field_data.get_scalar_field_data("phase-1:SV_P", surface_name="wall-elbow").size
 2168
 >>> file_session.field_data.get_scalar_field_data("phase-1:SV_P", surface_name="wall-elbow")[1100].scalar_data
 1.4444035696104466e-11
 >>> file_session.field_data.get_vector_field_data("phase-2:velocity", surface_name="wall-elbow").size
 2168
 >>> file_session.field_data.get_vector_field_data("phase-2:velocity", surface_name="wall-elbow")[1000].x
 0.0

Sample usage#

You can use the Graphics toolbar to display the mesh, contour and vector data respectively.

>>> from ansys.fluent.visualization import set_config
>>> set_config(blocking=True, set_view_on_display="isometric")
>>> import ansys.fluent.core as pyfluent
>>> from ansys.fluent.core import examples
>>> from ansys.fluent.visualization.matplotlib import Plots
>>> from ansys.fluent.visualization.pyvista import Graphics
>>> from ansys.fluent.core.file_session  import FileSession
>>> fileSession=FileSession()
>>> fileSession.read_case("elbow1.cas.h5")
>>> fileSession.read_data("elbow1.dat.h5")
>>> graphics = Graphics(session=fileSession)

Display mesh at wall.

>>> mesh1 = graphics.Meshes["mesh-1"]
>>> mesh1.show_edges = True
>>> mesh1.surfaces_list = [ "wall"]
>>> mesh1.display("w1")

Display temperature contour at symmetry.

>>> contour1 = graphics.Contours["mesh-1"]
>>> contour1.node_values = False
>>> contour1.field = "SV_T"
>>> contour1.surfaces_list = ['symmetry']
>>> contour1.display('w2')

Display velocity vector data at symmetry and wall.

>>> velocity_vector = graphics.Vectors["velocity-vector"]
>>> velocity_vector.field = "SV_T"
>>> velocity_vector.surfaces_list = ['symmetry', 'wall']
>>> velocity_vector.display("w3")

Reader for Fluent data files.

Example#

>>> from ansys.fluent.core import examples
>>> from ansys.fluent.core.filereader.data_file import DataFile

>>> data_file_name = examples.download_file("elbow1.dat.h5", "pyfluent/file_session", return_without_path=False)

>>> reader = DataFile(data_file_name=data_file_name) # Instantiate a DataFile class

Classes:

DataFile([data_file_name, ...])

Class to read a Fluent case file.

class ansys.fluent.core.filereader.data_file.DataFile(data_file_name=None, project_file_name=None, case_file_handle=None)#

Bases: object

Class to read a Fluent case file.

Methods

`case_file`	Returns the name of the associated case file in string format.
`get_face_variables`(phase_name)	Extracts face variables available for a particular phase.
`get_phases`()	Returns list of phases available.
`get_cell_variables`(phase_name)	Extracts cell variables available for a particular phase.
`get_face_scalar_field_data`(phase_name, ...)	Gets scalar field data for face.
`get_face_vector_field_data`(phase_name, ...)	Gets vector field data for face.

Methods:

`__init__`([data_file_name, ...])	__init__ method of CaseFile class.
`get_cell_variables`(phase_name)	Extracts cell variables available for a particular phase.
`get_face_scalar_field_data`(phase_name, ...)	Gets scalar field data for face.
`get_face_variables`(phase_name)	Extracts face variables available for a particular phase.
`get_face_vector_field_data`(phase_name, ...)	Gets vector field data for face.
`get_phases`()	Returns list of phases available.
`variables`()	Returns all associated data variables in form of a dictionary.

Attributes:

case_file

Returns the name of the associated case file in string format.

__init__(data_file_name=None, project_file_name=None, case_file_handle=None)#: __init__ method of CaseFile class.

property case_file: str#: Returns the name of the associated case file in string format.

get_cell_variables(phase_name)#

Extracts cell variables available for a particular phase.

Parameters:

phase_namestr: Name of the phase.

Returns:

List of cell variables.

get_face_scalar_field_data(phase_name, field_name, surface_id)#

Gets scalar field data for face.

Parameters:

phase_namestr: Name of the phase.
field_name: str: Name of the field
surface_idList[int]: List of surface IDs for scalar field data.

Returns:

Numpy array containing scalar field data for a particular phase, field and surface.

get_face_variables(phase_name)#

Extracts face variables available for a particular phase.

Parameters:

phase_namestr: Name of the phase.

Returns:

List of face variables.

get_face_vector_field_data(phase_name, surface_id)#

Gets vector field data for face.

Parameters:

phase_namestr: Name of the phase.
surface_idList[int]: List of surface IDs for vector field data.

Returns:

Numpy array containing scalar field data for a particular phase, field and surface.

get_phases()#: Returns list of phases available.

variables()#: Returns all associated data variables in form of a dictionary.