Star CCM Plus HPC Cluster

Bal21 · December 8, 2021, 08:31

Hi,

I'm a university student and I'm using star ccm plus (educational license) to run a big complex geometry in a small computer.
The problem is in the volume mesh. I can send the file (after meshing) to the hpc cluster the university. I haven't done that but others have. So it's doable.

However, I don't know if I can use the hpc to generate the volume mesh or not? If yes, can you please direct me to files that contain information about the codes, etc.

Thanks

LuckyTran · December 8, 2021, 18:20

You can mesh it on a cluster. The exact same program is run on a grid as your PC (it's the exact same executable). The only time it doesn't work is if your HPC is not setup correctly to run Star in parallel.

Bal21 · December 8, 2021, 22:14

Thanks a lot!

Do you know where can I find some explanations, codes, etc about running star in a cluster?

LuckyTran · December 10, 2021, 13:38

Like I said, the executable is the same even when run on the cluster. If you can do it on your PC, it will run on the cluster.

However, the devil is in the details. Actually running it on a cluster is where 99% of the unrelated issues are. Things like, where is the on/off button on a cluster are different than on your PC. For these issues, your most helpful resource will be to find someone that has done it before on your cluster. Or, find your cluster admin. Every cluster is configured differently. There's also a ton of info in the star help (press the help button).

The critical details that are common though is your .sim and a basic .java macro to run your simulation in batch mode. If you don't have a macro already... hit record macro, set your stopping criteria, and press the run button, press stop record. Then open the .java file and have a look around. You link this macro in the scripted command when you launch star. It looks something like:

starccm blahblahblah -batch run.java

Bal21 · December 10, 2021, 17:05

A million thanks.
I'm actually going to have a meeting with the cluster admin. But my biggest worry right now, is related to the star ccm errors. Would I encounter more star ccm errors just because I'm running it in a cluster? I have a turbulent 3D model.

Also, I read about using the "simulation operations" option under tools. This one seemed very easy as well, but I don't know if I can use it for my model or not

December 8, 2021, 08:31	Star CCM Plus HPC Cluster	#1
Bal21 Member Bal Join Date: Nov 2021 Posts: 49 Rep Power: 4	Hi, I'm a university student and I'm using star ccm plus (educational license) to run a big complex geometry in a small computer. The problem is in the volume mesh. I can send the file (after meshing) to the hpc cluster the university. I haven't done that but others have. So it's doable. However, I don't know if I can use the hpc to generate the volume mesh or not? If yes, can you please direct me to files that contain information about the codes, etc. Thanks

December 8, 2021, 22:14	Additional Information	#3
Bal21 Member Bal Join Date: Nov 2021 Posts: 49 Rep Power: 4	Thanks a lot! Do you know where can I find some explanations, codes, etc about running star in a cluster?

December 10, 2021, 13:38		#4
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,682 Rep Power: 66	Like I said, the executable is the same even when run on the cluster. If you can do it on your PC, it will run on the cluster. However, the devil is in the details. Actually running it on a cluster is where 99% of the unrelated issues are. Things like, where is the on/off button on a cluster are different than on your PC. For these issues, your most helpful resource will be to find someone that has done it before on your cluster. Or, find your cluster admin. Every cluster is configured differently. There's also a ton of info in the star help (press the help button). The critical details that are common though is your .sim and a basic .java macro to run your simulation in batch mode. If you don't have a macro already... hit record macro, set your stopping criteria, and press the run button, press stop record. Then open the .java file and have a look around. You link this macro in the scripted command when you launch star. It looks something like: starccm blahblahblah -batch run.java Peresvet and Bal21 like this.

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December 8, 2021, 18:20		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,682 Rep Power: 66	You can mesh it on a cluster. The exact same program is run on a grid as your PC (it's the exact same executable). The only time it doesn't work is if your HPC is not setup correctly to run Star in parallel.

December 10, 2021, 17:05		#5
Bal21 Member Bal Join Date: Nov 2021 Posts: 49 Rep Power: 4	A million thanks. I'm actually going to have a meeting with the cluster admin. But my biggest worry right now, is related to the star ccm errors. Would I encounter more star ccm errors just because I'm running it in a cluster? I have a turbulent 3D model. Also, I read about using the "simulation operations" option under tools. This one seemed very easy as well, but I don't know if I can use it for my model or not