Visualising Fluent .dat results in ParaView as a single transient case

theturbulence · July 23, 2025, 13:02

I have results as .dat file for time steps from an Ansys Fluent transient analysis. I want to visualise it in ParaView under one umbrella so I can parse through with the play button. Do I need to save them as EnSight one by one with a script? How could I then merge them into one case inside ParaView?

bigfootedrockmidget · July 24, 2025, 06:23

Yes, just open the cas and dat file using a journalfile and then export results in paraview. You can then load all individual timesteps as a sequence in paraviev by clicking the collapsed file list file_0.* (the files should have a clear 'sequence' in the name like file_0.001, file_0.002 etc.)

Code:

; *** journalfile.jou ***

; *** read case,data file *** 
/file/read-case "file_SEQUENCE.cas.gz"
/file/read-data "file_SQQUENCE.dat.gz"
; *** export to ensight ***

/file/export/ensight-gold 

file_SEQUENCE
temperature
...

and then use a bash script or similar to loop over all case files and replace "SEQUENCE" with the timestep and start fluent with the journalfile.

theturbulence · July 24, 2025, 08:39

okay yes i also kind of thought of this and after your lead i coded it, but the second question still remains. how could i now merge all the .encas files so i can play them as one thing in paraview.

July 23, 2025, 13:02	Visualising Fluent .dat results in ParaView as a single transient case	#1
theturbulence New Member Join Date: Jul 2025 Posts: 2 Rep Power: 0	I have results as .dat file for time steps from an Ansys Fluent transient analysis. I want to visualise it in ParaView under one umbrella so I can parse through with the play button. Do I need to save them as EnSight one by one with a script? How could I then merge them into one case inside ParaView?

July 24, 2025, 06:23		#2
bigfootedrockmidget Senior Member bigfoot Join Date: Dec 2011 Location: Netherlands Posts: 826 Rep Power: 23	Yes, just open the cas and dat file using a journalfile and then export results in paraview. You can then load all individual timesteps as a sequence in paraviev by clicking the collapsed file list file_0.* (the files should have a clear 'sequence' in the name like file_0.001, file_0.002 etc.) Code: ; * journalfile.jou * ; * read case,data file * /file/read-case "file_SEQUENCE.cas.gz" /file/read-data "file_SQQUENCE.dat.gz" ; * export to ensight * /file/export/ensight-gold file_SEQUENCE temperature ... and then use a bash script or similar to loop over all case files and replace "SEQUENCE" with the timestep and start fluent with the journalfile.

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July 24, 2025, 08:39		#3
theturbulence New Member Join Date: Jul 2025 Posts: 2 Rep Power: 0	okay yes i also kind of thought of this and after your lead i coded it, but the second question still remains. how could i now merge all the .encas files so i can play them as one thing in paraview.