Hi,
I am trying to simulate pavel's tutorial using ELMER. I have a question regarding Multi-Slice Simulation, i have given following commands in my Virtual machine
ns=4
slen=0.04
# make rotor and stator elmer meshes from geo files
gmsh gmsh/im_stator.geo -2 -o im_stator.msh
ElmerGrid 14 2 im_stator.msh -2d -autoclean -names
gmsh gmsh/im_rotor.geo -2 -o im_rotor.msh
ElmerGrid 14 2 im_rotor.msh -2d -autoclean -names
# unite and scale to SI
ElmerGrid 2 2 im_stator -in im_rotor -unite -autoclean -names -out im
ElmerGrid 2 2 im -scale 0.001 0.001 0.001
# create slices
ElmerGrid 2 2 im -out imms -clone 1 1 $ns -clonesize 0 0 $slen
ElmerGrid 2 2 imms -partition 1 1 $ns
cp im/mesh.names imms/mesh.name
After making imms folder,i tried to run transient.sif file after first iteration it gave the error
'' WARNING:: LevelProjector: Projector % InvPerm not set in for dofs: 48
RotationalInterfaceMeshes: You might try to switch master and target!
ERROR:: RotationalInterfaceMeshes: Check your settings, this cannot be periodic!
Note: The following floating-point exceptions are signalling: IEEE_DENORMAL''
How can i deal with this?
secondly, i in tutorial it is mention that ''The last ElmerGrid command -partition 1 1 $ns creates 1 partition per slice (you can check the result of slicing in ParaView by using ElmerGrid with the second parameter 5)''. According to my understanding i change the command like '' ElmerGrid 2 5 imms -partition 1 1 $ns'' and for the next i changed partition seconed parameter to 5, but i got nothing. I am very confused in that please guide me to resolve this issue.
Thanks
Pavel SEMTEC IM tutorial
Pavel SEMTEC IM tutorial
- Attachments
-
- node.PNG (222.79 KiB) Viewed 7284 times
Re: Pavel SEMTEC IM tutorial
Hi,
Which command you used to run the simulation?
It might be an issue with your local MPI setup as multi-slice model works only in parallel with MPI.
Google about MPI and run Elmer tests related to MPI, see if they pass.
BR, Pavel
Which command you used to run the simulation?
It might be an issue with your local MPI setup as multi-slice model works only in parallel with MPI.
Google about MPI and run Elmer tests related to MPI, see if they pass.
BR, Pavel
Re: Pavel SEMTEC IM tutorial
I am running my simulation using Taito CSC server. I am successful in running the simulation as parallel job. But I am not able to visualize the results as shown in tutorial like mine one is not showing 4 slices.
# create slices
ElmerGrid 2 2 im -out imms -clone 1 1 $ns -clonesize 0 0 $slen
ElmerGrid 2 2 imms -partition 1 1 $ns cp im/mesh.names imms/mesh.name
pavel wrote that '' The last ElmerGrid command -partition 1 1 $ns creates 1 partition per slice (you can check the result of slicing in ParaView by using ElmerGrid with the second parameter 5). I am confuse about that how I to modify and get result in Paraview. I have attached my .sh file, Paraview result picture of multislice simulation, and later mentioned issue. Once I will get out of this issue I will try to simulate your results.
Secondly, In the following lines# create slices
ElmerGrid 2 2 im -out imms -clone 1 1 $ns -clonesize 0 0 $slen
ElmerGrid 2 2 imms -partition 1 1 $ns cp im/mesh.names imms/mesh.name
pavel wrote that '' The last ElmerGrid command -partition 1 1 $ns creates 1 partition per slice (you can check the result of slicing in ParaView by using ElmerGrid with the second parameter 5). I am confuse about that how I to modify and get result in Paraview. I have attached my .sh file, Paraview result picture of multislice simulation, and later mentioned issue. Once I will get out of this issue I will try to simulate your results.
Re: Pavel SEMTEC IM tutorial
Hi,
Parallel paraview files should have extension .pvtu. Look for those files.
And a general advise is to debug your parallel runs locally before running those batch jobs remotely.
BR, Pavel
Parallel paraview files should have extension .pvtu. Look for those files.
And a general advise is to debug your parallel runs locally before running those batch jobs remotely.
BR, Pavel
Re: Pavel SEMTEC IM tutorial
Yes, pavel i got Parallel paraview files should have extension .pvtu. Thanks
Re: Pavel SEMTEC IM tutorial
Hi,
Pavel i have question about iron loss coefficients, how you have computed them? they are for M800-65A if i am not wrong . And the values in loss.dat file . Are these values are for no load condition?
Thanks
Pavel i have question about iron loss coefficients, how you have computed them? they are for M800-65A if i am not wrong . And the values in loss.dat file . Are these values are for no load condition?
Thanks
Re: Pavel SEMTEC IM tutorial
Hi,
I have a question regarding iron loss.I simulated transient loss.sif file and I got results as shown in the figure (attached in above message). Can you help me in understanding them more? Are these values are for no load condition? Actually, i want to calculate loss values at 32.5 N load condition. Give me some instruction how i can i reach that goal.
Thanks
Minhaj
I have a question regarding iron loss.I simulated transient loss.sif file and I got results as shown in the figure (attached in above message). Can you help me in understanding them more? Are these values are for no load condition? Actually, i want to calculate loss values at 32.5 N load condition. Give me some instruction how i can i reach that goal.
Thanks
Minhaj
Re: Pavel SEMTEC IM tutorial
Hi,
This sif should result in iron losses at nominal point as the rotor runs with nominal slip
https://github.com/pavelponomarev/Elmer ... n_loss.sif
The coefficients for the iron losses I have taken from one of the publications, and unfortunately I do not remember exactly which one. Please google publications regarding FEM iron losses models and look in several top-cited. I am sure you will find these numbers there.
BR, Pavel
This sif should result in iron losses at nominal point as the rotor runs with nominal slip
https://github.com/pavelponomarev/Elmer ... n_loss.sif
The coefficients for the iron losses I have taken from one of the publications, and unfortunately I do not remember exactly which one. Please google publications regarding FEM iron losses models and look in several top-cited. I am sure you will find these numbers there.
BR, Pavel