The thread was originally in regards to Eddy 1..
I assume you’re using Eddy 2., which no longer relies on Nuke to handle sub-stepping and handles all the graph interpolation/sub-stepping now internally to overcome the original issue mentioned here.
I might need more information on your effect, but I thought its worth mentioning something you can try quickly.
In case your emission source is moving large distances from frame to frame it helps to increase the Min Time Steps parameter in your simulation element. Increasing the min/max step parameter will enforce sub-stepping of emission inputs, particularly if they don’t modify the velocity field.
The sub-stepping algorithm used by default is velocity based and only triggers more sub-steps as the ratio of the largest velocity in the your simulation increases in respect to your voxel size. The larger the ratio, the more steps the simulation should take.
The above graph motion blur setup can be used in conjunction with the sub-stepping. It can speed things up, if taking simulation sub-steps is too slow in your case ( eg if its a very large simulation ), but it requires a correct velocity field describing the object’s motion.
I hope this helps a bit.