{"id":327241,"date":"2023-12-10T21:56:59","date_gmt":"2023-12-10T21:56:59","guid":{"rendered":"\/forum\/forums\/topic\/trying-to-automate-boundary-conditions-using-pyfluent-and-setup-simulation\/"},"modified":"2023-12-10T21:56:59","modified_gmt":"2023-12-10T21:56:59","slug":"trying-to-automate-boundary-conditions-using-pyfluent-and-setup-simulation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/trying-to-automate-boundary-conditions-using-pyfluent-and-setup-simulation\/","title":{"rendered":"trying to automate boundary conditions using pyfluent and setup simulation"},"content":{"rendered":"

Version: Fluent 2022R2<\/p>\n

I have a simualtion setup already.  Using pyFluent, I’m able to read it in, and run the simulation without changing the boundary conditions.  However, when I try to change the boundary conditions, it throws a CAR error and haults the scrip execution.<\/p>\n

This is the command that ends up aborting execution: <\/p>\n

\n
solver.setup.boundary_conditions.pressure_far_field[‘cv_inlet’](m = 3.0, t = 230)<\/em><\/div>\n<\/div>\n

Here is the output:<\/p>\n

Traceback (most recent call last):<\/em>
  File “c:\/pyFluent\/Work\/fluenttest.py”, line 8, in <module><\/em>
  File “C:\\ProgramData\\Anaconda2021_05\\lib\\site-packages\\ansys\\fluent\\core\\solver\\flobject.py”, line 405, in __call__<\/em>
    self.set_state(kwargs)<\/em>
  File “C:\\ProgramData\\Anaconda2021_05\\lib\\site-packages\\ansys\\fluent\\core\\solver\\flobject.py”, line 262, in set_state<\/em>
    return self.flproxy.set_var(self.path, self.to_scheme_keys(state))<\/em>
  File “C:\\ProgramData\\Anaconda2021_05\\lib\\site-packages\\ansys\\fluent\\core\\services\\settings.py”, line 102, in _fn<\/em>
    return fn(self, *args, **kwds)<\/em>
  File “C:\\ProgramData\\Anaconda2021_05\\lib\\site-packages\\ansys\\fluent\\core\\services\\settings.py”, line 168, in set_var<\/em>
    self._service_impl.set_var(request)<\/em>
  File “C:\\ProgramData\\Anaconda2021_05\\lib\\site-packages\\ansys\\fluent\\core\\services\\error_handler.py”, line 15, in func<\/em>
    raise RuntimeError(ex.details()) from None<\/em>
RuntimeError: CAR: invalid argument [1]: wrong type [not a pair]<\/em>
Error Object: 3<\/em><\/p>\n

This command does execute:<\/em><\/p>\n

\n
print(solver.setup.boundary_conditions.pressure_far_field())<\/em><\/div>\n
output:<\/div>\n
\n
{‘cv_inlet’: {‘p’: {‘option’: ‘constant or expression’, ‘constant’: 0}, ‘m’: {‘option’: ‘constant or expression’, ‘constant’: 2.5}, ‘t’: {‘option’: ‘constant or expression’, ‘constant’: 300}, ‘coordinate_system’: ‘Cartesian (X, Y, Z)’, ‘ni’: {‘option’: ‘constant or expression’, ‘constant’: 0.9063077869999999}, ‘nj’: {‘option’: ‘constant or expression’, ‘constant’: 0.4226182620000001}, ‘nk’: {‘option’: ‘constant or expression’, ‘constant’: 0}, ‘flow_direction_component’: [{‘option’: ‘constant or expression’, ‘constant’: 0.9063077869999999}, {‘option’: ‘constant or expression’, ‘constant’: 0.4226182620000001}, {‘option’: ‘constant or expression’, ‘constant’: 0}], ‘ke_spec’: ‘Intensity and Viscosity Ratio’, ‘turb_intensity’: 0.05, ‘turb_viscosity_ratio’: 10},  ‘cv_exit’: {‘p’: {‘option’: ‘constant or expression’, ‘constant’: 0}, ‘m’: {‘option’: ‘constant or expression’, ‘constant’: 2.5}, ‘t’: {‘option’: ‘constant or expression’, ‘constant’: 300}, ‘coordinate_system’: ‘Cartesian (X, Y, Z)’, ‘ni’: {‘option’: ‘constant or expression’, ‘constant’: 0.9063077869999999}, ‘nj’: {‘option’: ‘constant or expression’, ‘constant’: 0.4226182620000001}, ‘nk’: {‘option’: ‘constant or expression’, ‘constant’: 0}, ‘flow_direction_component’: [{‘option’: ‘constant or expression’, ‘constant’: 0.9063077869999999}, {‘option’: ‘constant or expression’, ‘constant’: 0.4226182620000001}, {‘option’: ‘constant or expression’, ‘constant’: 0}], ‘ke_spec’: ‘Intensity and Viscosity Ratio’, ‘turb_intensity’: 0.05, ‘turb_viscosity_ratio’: 10}}<\/em><\/div>\n
 <\/div>\n
I’m perplexed as I’ve seen a very similar command in a pyfluent training video:<\/div>\n
https:\/\/youtu.be\/5nt8A7b3Wlk?t=495<\/a><\/div>\n
solver.setup.boundary_conditions.velocity_inlet[‘velocity_inlet_1’](vmag = 1, t = 300).<\/div>\n
 <\/div>\n
I realize I’m solving a sim with different boundary condition types, but the syntax should be similar.  Anyone know what’s going on?<\/div>\n<\/div>\n<\/div>\n","protected":false},"template":"","class_list":["post-327241","topic","type-topic","status-closed","hentry","topic-tag-fluent-cfd-ansys-1","topic-tag-fluent","topic-tag-python","topic-tag-python-scripting"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["49725","2404","199"],"_bbp_author_ip":["23.206.193.146"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1357"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["327241"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","2404","49725"],"_bbp_voice_count":["3"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["338202"],"_bbp_last_active_id":["338202"],"_bbp_last_active_time":["2023-12-12 13:29:27"]},"test":"christopher-mifflinngc-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/327241","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/327241\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=327241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}