SimScale CAE Forum

How to resolve "Signal 15 encountered" error during simulation run?


#1

I’m working on a project called “Flow over cylinder”, and it can be found here:

https://www.simscale.com/workbench/?pid=474400676465172817

I have a simulation called “Water Flow 2”, and in there I have a run called “one tenths meters per second - 40 seconds - 32 cores - write every 400 timesteps”. This run went to 59% before failing. The error I’m seeing in the solver log is:

 Signal 15 encountered 

What could this error mean, and what ways are there to resolve it?


#2

Hi @tryabin,

This is a quite a large simulation :wink: We are currently investigating why you are getting this error and will get back to you when we have more details!

Best,
Anna


#3

Hey @tryabin,

There are some changes required to the simulation setup. Firstly, I couldn’t find the reason for your simulation failing with “Signal 15” error. The log looks fine before the error occurred. I have reproduced your case with some changes - you can access the project using the following link.

https://www.simscale.com/projects/sjesu_rajendra/flow_over_cylinder_1/

  1. Kindly note that there are no layers in the mesh which was created. This is due to the reason that there is a single curved face. I’ve made a face split to generate 2 faces. Snappy on SimScale requires 2 or more faces to generate layers.

  2. I’ve reduced the mesh volume to decrease the computational time. Now it has less than 790000 cells.

  3. I duplicated your simulation - changed the mesh and increased the timestep to 0.002. The simulation and results look fine.

I would get back to you if I manage to find the reason for Signal 15 error. I believe this should help you to proceed with the simulations.

Regards,
Sam


#4

Thanks, I figured out that the reason the geometry had only one face was because I was importing an STL file instead of a STEP file.