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Encountering 'java.net.SocketException' Error when Initializing Solution |
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#1 |
New Member
Nate
Join Date: Jan 2019
Posts: 2
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Hi all,
I want to preface by saying this is my first post in this forum, if I am missing information or this is the incorrect place to post please let me know. I am also an undergraduate student. I am by no means an expert on CFD, but I have been using Star CCM+ for four years now with guidance from professors, coworkers and other peers so I am semi-confident in troubleshooting most issues I encounter, however this is a new one. The case I am having issues with is an external flow analysis of a multi-element wing, low-Reynolds numbers. Most of my setup follows Star's "Best Practices" listed in their manual along with personal experience from what has worked best in the past. Physics Setup: -RANS -Steady State -3D -Constant Density -Segregated Flow -All y+ Treatment -Exact Wall Distance -K-Omega Turbulence -SST (Menter) K-Omega The case is fairly small, ~10 million cells. I'm running on fairly limited hardware: 32 GB memory and 8 threads. I encounter the error when I initialize the solution. When the initialization reaches the "Computing Wall Distance: Vertex Distance" the program freezes and closes the simulation. Star CCM+ stays open, but with no simulation open. A window pops up with the error message, I have attached a screenshot of the error along with the Star CCM+ log for that session. My attempts to resolve the issue: 1. I checked with our university's IT to make sure this wasn't an issue with a license or server error. They said everything was good on their end so I proceeded to check my model. 2. This was the 5th case that I had been running in this experiment. I have been making modifications to the geometry in between using NX so my first thought was to check my CAD model for issues. I remodeled one surface that could've been leaving a very small sliver. I also checked the model for empty pockets within bodies, infinitely thin sections, sharp edges, etc. Once I was confident in the model I created a new simulation but encountered the same error. 3. I checked the surface mesh for any errors using Star's built in "mesh repair" tool. It marked no issues with any cells. 4. I tried switching to a K-Epsilon turbulence model and decreased my number of prism layers to 10. I just wanted to see if I could get a case running, but unfortunately I still encountered the same error. I've also done plenty of digging on google for similar issues and haven't come up with anything yet. I figured this would be a good place to ask for some support. I appreciate in advance any help! |
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#2 |
Senior Member
Lucky Tran
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 4,043
Rep Power: 49 ![]() ![]() |
The error message only says Star crashed. No special or specific info.
If it crashes during initialization then probably you have a bad reference in one of your plots or something. Did you reuse an old .sim file and try to swap out the mesh or do you start clean every time? |
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#3 |
New Member
Nate
Join Date: Jan 2019
Posts: 2
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Creating a new sim file every time and generating a new mesh.
The point about having a bad reference in a plot is interesting though. I might try deleting any monitors and plots that I’ve created and see if I can get it to run. If it works then I’ll check my references. Thanks for the help! |
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#4 |
New Member
Join Date: Mar 2012
Posts: 12
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Hello, I am facing the same error. the meshing initialization happens but parallel meshing fails with this error while serial meshing works. May I know whether you were able to solve this issue or not
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Tags |
java, java error, wall distance |
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