{"id":293850,"date":"2023-07-19T12:41:29","date_gmt":"2023-07-19T12:41:29","guid":{"rendered":"\/forum\/forums\/topic\/extract-the-vector-field-of-the-fluid-domain\/"},"modified":"2023-07-19T12:45:03","modified_gmt":"2023-07-19T12:45:03","slug":"extract-the-vector-field-of-the-fluid-domain","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/extract-the-vector-field-of-the-fluid-domain\/","title":{"rendered":"Extract the vector field of the fluid domain"},"content":{"rendered":"

Hi,<\/p>\n

I’m having trouble doing something pretty basic… I want to extract the vector field from a .dat.gz of the volume\/fluid domain “surface”.
To be clear: I want the DataFrame with columns=[nodes_number, x, y, z, velocity_x, velocity_y, velocity_z]<\/p>\n

Here is a test code:<\/p>\n

import ansys.fluent.core as pyfluent
from ansys.fluent.core import examples<\/p>\n

file = examples.download_file(
filename=”manifold_solution.cas.h5″, directory=”pyfluent\/exhaust_manifold”
)
file_dat = examples.download_file(
filename=”manifold_solution.dat.h5″, directory=”pyfluent\/exhaust_manifold”
)<\/p>\n

solver = pyfluent.launch_fluent(precision=’double’, processor_count=1, mode=”solver”)
solver.file.read(file_type=”case-data”, file_name=file)<\/p>\n

field_data = solver.field_data
vector_field = field_data.get_vector_field_data(field_name=”velocity”, surface_name=”fluid1″)
print(vector_field)<\/div>\n

 <\/div>\n
 <\/div>\n
 <\/div>\n
And here is the traceback:<\/div>\n
 <\/div>\n
\n
C:\\Users\\ARD\\anaconda3\\Lib\\site-packages\\paramiko\\transport.py:219: CryptographyDeprecationWarning: Blowfish has been deprecated
“class”: algorithms.Blowfish,
Checking if specified file already exists…
File already exists. File path:
C:\\Users\\ARD\\AppData\\Local\\Ansys\\ansys_fluent_core\\examples\\manifold_solution.cas.h5
Checking if specified file already exists…
File already exists. File path:
C:\\Users\\ARD\\AppData\\Local\\Ansys\\ansys_fluent_core\\examples\\manifold_solution.dat.h5
Fast-loading “C:\\PROGRA~1\\ANSYSI~1\\v231\\fluent\\fluent23.1.0\\\\addons\\afd\\lib\\hdfio.bin”
Done.
Note: Rank = 0: Process affinity not being set (6).<\/p>\n

Reading from SYC-29:”C:\\Users\\ARD\\AppData\\Local\\Ansys\\ansys_fluent_core\\examples\\manifold_solution.cas.h5″ in NODE0 mode …
Reading mesh …
288590 cells, 2 cell zones …
201658 polyhedra cells, zone id: 815
86932 polyhedra cells, zone id: 818
1795387 faces, 13 face zones …
454038 polygonal interior faces, zone id: 817
1258889 polygonal interior faces, zone id: 814
275 polygonal pressure-outlet faces, zone id: 559
261 polygonal velocity-inlet faces, zone id: 463
265 polygonal velocity-inlet faces, zone id: 367
262 polygonal velocity-inlet faces, zone id: 272
51846 polygonal wall faces, zone id: 226
13399 polygonal wall faces, zone id: 830
13399 polygonal wall faces, zone id: 2
724 polygonal wall faces, zone id: 181
676 polygonal wall faces, zone id: 180
678 polygonal wall faces, zone id: 179
675 polygonal wall faces, zone id: 178
1408040 nodes, 1 node zone …
Warning: reading 4 partition grid onto 1 compute node machine.
Combining every 4 partitions.
Done.<\/p>\n

Building…
mesh
materials,
interface,
domains,
mixture
zones,
solid_up:1:830-shadow
interior–fluid1
interior–solid_up
outlet
inlet2
inlet1
inlet
solid_up:1
solid_up:1:830
out1
in3
in2
in1
fluid1
solid_up
parallel,
Done.<\/p>\n

Reading from SYC-29:”C:\\Users\\ARD\\AppData\\Local\\Ansys\\ansys_fluent_core\\examples\\manifold_solution.dat.h5″ in NODE0 mode …<\/p>\n

Reading results.
Parallel variables…
Done.
Traceback (most recent call last):
File “D:\\python\\stansys\\example_stack_overflow.py”, line 15, in
vector_field = field_data.get_vector_field_data(field_name=”velocity”, surface_name=”fluid1″)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “C:\\Users\\ARD\\anaconda3\\Lib\\site-packages\\ansys\\fluent\\core\\services\\field_data.py”, line 359, in __call__
return self._field_data_accessor(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “C:\\Users\\ARD\\anaconda3\\Lib\\site-packages\\ansys\\fluent\\core\\services\\field_data.py”, line 1336, in get_vector_field_data
surface_ids = _get_surface_ids(
^^^^^^^^^^^^^^^^^
File “C:\\Users\\ARD\\anaconda3\\Lib\\site-packages\\ansys\\fluent\\core\\services\\field_data.py”, line 730, in _get_surface_ids
allowed_surface_names.valid_name(surface_name)
File “C:\\Users\\ARD\\anaconda3\\Lib\\site-packages\\ansys\\fluent\\core\\services\\field_data.py”, line 293, in valid_name
raise SurfaceNameError(
ansys.fluent.core.services.field_data.SurfaceNameError: fluid1 is not an allowed surface name.
The most similar names are: solid_up:1.<\/div>\n<\/div>\n","protected":false},"template":"","class_list":["post-293850","topic","type-topic","status-closed","hentry","topic-tag-python-scripts-2"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t