EnSight can handle Discrete Phase information (i.e. particle tracks, droplets, solid objects, discrete elements) into the post processing along with the typical continuous phase information. In specific regards to Fluent Particle data, you can visit this instructional video on the basics of getting your discrete phase data into EnSight.
Ansys EnSight: Exporting Particle Data from Fluent into EnSight
Currently (up to at least Fluent 15), when you attempt to export multiple injections from Fluent to the EnSight format, each injection is written as its own set of Measured Data files **SEPARATELY**, with separate .encas files written.
The result is that if you were to attempt to load any of the separate .encas files into EnSight, you would only see particles from a single injection. You could perhaps load in the multiple .encas files as multiple cases, but this would perhaps multiply the amount of memory used, result in lots of extra parts, and is not a suggested method (although it might work for you).
Fluent is aware of this issue, and have been requested to correctly export multiple injections to a single set of Measured Data files. Their schedule for that improvement is currently unknown.
However, in the meantime, there is a potential work around for this. With a short
python script, one can merge the various injections into a single set of measured
data files, so that you can visualize all of the injections in a single case. In
addition to merging the injections, the routine also creates one additional variable
called inj_id for the injection ID. Thus, you can still analyze,
interrogate, visualize separate injections within EnSight, even though it is
contained within a single Measured Data Part.
The python routine does require a very minor edit, based on your particular dataset, variable export, and timesteps.
Ansys EnSight: Merging Multiple Injections Exports into a Single Measured Data Set