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September 19, 2019, 09:23 |
CFD-Post run session on hpc
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#1 |
Member
Thomas
Join Date: Nov 2017
Posts: 37
Rep Power: 8 |
Dear all
Currently I have a large transient simulation which I try to post process in CFD-post. However as this can be tedious I am exporting data from multiple planes in the domain through a session file (perl script). This works fine if I have only a few planes. However I need to do the same for a large amount of planes (>100). This takes time and the workstation is hammering my harddrives as it accesses every time step individual. So my question is how can I do exactly this but on an hpc. This may not go quicker but it is of my computer. Does anyone know how I can run CFD-post on the hpc, load a results file and play a session file? Thank you for your suggestions. |
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September 22, 2019, 19:19 |
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#2 |
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Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
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You might also consider a high-end post processing package like Ensight, Fieldview or Tecplot. They have are designed to handle massive data sets.
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Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum. |
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September 23, 2019, 13:20 |
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#3 |
Senior Member
Erik
Join Date: Feb 2011
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Working off a SSD or RAID SSD will also speed this up compared to using hard drives. What type of drive is the .res file and transient files saved to?
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October 3, 2019, 10:02 |
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#4 |
Member
Thomas
Join Date: Nov 2017
Posts: 37
Rep Power: 8 |
Thank you very much for your replies. I agree with all suggestions. Working of an SSD definitely helps and a different post-processing package as well. The reason for moving the post-processing onto the HPC is not necessarily to speed it up, but to free local resources.
I did see that cfd-post can be run through the command window and I tried the following: #!/bin/bash #SBATCH -p hipri #select partition (hipri, medpri, lowpri) #SBATCH -J Post #Job name #SBATCH -o slurm-%j.out #Output #SBATCH --nodes=1 #number of nodes #SBATCH -n 1 #number of cores #SBATCH -t 0-00:10 #time (D-HH-MM) module load ansys/182 #SBATCH -cwd cfx5post -batch HPC.cse where HPC.cse is the session file I want to run. However I get the following errors: viewer_ogl.exe: cannot connect to X server localhost:13.0 Socket::waitForConnection - Connection timeout after 120s I assume that this has something to do with the interface. I am using PuTTY and have enabled X11 forwarding. Technically I don't need an interface but I assume that CFD-Post only runs with and interface? How do I set it up correctly so I can run it on the HPC? This afternoon I was able to run exactly what I want to do on the cluster on my local machine through the command line window. I did notice that I had to adjust a few commands. But with the fillowing command line it did work on the local computer: cfx5post -line -batch HPC.cse Test.res However when running on the HPC I still have the same issue described above. Does anyone have an advice? Last edited by hand90; October 3, 2019 at 12:16. |
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cfd-post, hpc |
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