I am trying to compute vorticity for a fire snapshot. I've put down a sphere (sp), and can access some other derived fields, but for some reason things like vorticity give me the following error. Does anyone have suggestions as to what I'm doing wrong?
>>> sp['gas','velocity_magnitude']
YTArray([ 53724618.56288539, 48756921.3449135 , 46197475.78549621, ...,
53664392.60568497, 46881343.68564206, 50050673.058614 ]) cm/s
>>> sp['gas','vorticity_x']
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/prachi/anaconda2/lib/python2.7/site-packages/yt/data_objects/data_containers.py", line 281, in __getitem__
self.get_data(f)
File "/home/prachi/anaconda2/lib/python2.7/site-packages/yt/data_objects/data_containers.py", line 1295, in get_data
self._generate_fields(fields_to_generate)
File "/home/prachi/anaconda2/lib/python2.7/site-packages/yt/data_objects/data_containers.py", line 1315, in _generate_fields
fd = self._generate_field(field)
File "/home/prachi/anaconda2/lib/python2.7/site-packages/yt/data_objects/data_containers.py", line 318, in _generate_field
tr = self._generate_fluid_field(field)
File "/home/prachi/anaconda2/lib/python2.7/site-packages/yt/data_objects/data_containers.py", line 336, in _generate_fluid_field
rv = self._generate_spatial_fluid(field, ngt_exception.ghost_zones)
File "/home/prachi/anaconda2/lib/python2.7/site-packages/yt/data_objects/data_containers.py", line 359, in _generate_spatial_fluid
for i, chunk in enumerate(chunks):
File "/home/prachi/anaconda2/lib/python2.7/site-packages/yt/geometry/particle_geometry_handler.py", line 179, in _chunk_spatial
g = og.retrieve_ghost_zones(ngz, [], smoothed=True)
AttributeError: 'ParticleOctreeSubset' object has no attribute 'retrieve_ghost_zones'