Learning Forum

[danbence]

Exporting an ensight case gold file from fluent works well. However, with large simulation, the export process adds many hours onto the simulation time. I found that ticking the ?EnSight Parallel? option in the fluent export window speeds up the process considerably.nHowever, I cant find a way to load the files into EnSight (2020.r2) without fatal errors. Fluent creates a subdirectory with as many .encas files as there are cpu cores. (cnode_0.encas , cnode_1.encas etc)nIf I load the set of encas files by specifying ?cnode_*.encas? as the filename, I get the following error:-nError ERROR: Error> {s1:1} readensight_file_descrip() in geom.c:1215nof EnSight Server 2020 R2:nError ERROR: ensight error; type=Error no= 3 (00000003)nError ERROR: Reading geom file description linenError ERROR:nError reading data.nError from dr_do_read2().nIf I use the ?multiple file interface? button and add to list ?cnode_*.encas?. I get the same error.nAs I am trying to perform a task that practically everyone else needs to do, I can only imagine there is some step I don?t know about. Should this method work ? Perhaps ?ensight parallel? is not supported with moving meshes ?nAny advice would be appreciated.n

[Kalyan Goparaju]

Hello, nWithin the subdirectory that Fluent creates, in addition to the .encas files, there should be other folders with names starting with CNODE_*. Each of these folders should contain the .geo file and whatever the scalar and vector files that you have asked Fluent to write out. From the error, it sounds like EnSight wasn't able to find geometry information which is inside these subdirectories indicating that the directories are missing. This could be for one of two reasons nOnly the cas file was loaded into fluent at the time of writing or to put it differently, there was no variable data that could have been written out.nFailed write operation.nCan you check if the fluent session contains data? If it doesn't, that explains the cause of the error. If it does, can you try writing out the parallel format again and see if the subdirectories are created?nThanks, nKalyann

[danbence]

Thanks for your comments.nIn preparing my reply, I believe I have worked out the issue. When writing out the ensight parallel file in Fluent, I was unticking the ?separate file for each timestep? box. With it unticked, ensight reports an error. Ensight might be confused by cells moving between nodes due to dynamic meshes.n Using the ?multiple file interface? and ?adding to list? all the encas files in the created sub-directory, the load seems to work correctly.n

[Kalyan Goparaju]

Hello, nI am glad that you were able to find a solution. nCheers, nKalyan n