[yt-dev] NumberDensity in clumps and on FLASH data

[Matthew Turk]

Hi all,

Mark Richardson wrote to the yt_analysis project with a problem with
clumps on FLASH datasets.  Here's his email:

"Below includes my script and the output (it wouldn't let me attach
two files). I get some output in the clump file up until I'd expect to
see the Jeans Mass dumped. The output makes me think that it can't
calculate this point because Gamma is unknown, or some other essential
variable needed to get the number density. I've attempted to change
the data_structure.py frontend for Flash to alias Gamma to gamc and
game but I still get the 'cannot find Gamma' when loading my dataset."

The issue from the traceback is that JeansMassMsun requires
MeanMolecularWeight which needs NumberDensity.  This can't be
generated for his data.

I am not an expert on FLASH, but it seems that this should be
straightforward to fix, I just don't know how.  Anybody from the FLASH
or Clump side have any ideas?

-Matt