the analysis has stopped because the solver has exited unexpectedly

[h-master]

Dear sir/mam,

I have made a part in Catia and saved it as a step file.

Importinging in cfd gives no problem.

Filling the void also doesn't give a problem.

No issues whatsoever when I go on.

But when I try to solve the simulation, I immidatly get an error 😞

So I though maybe my model is too complex, so I used a simple tube, but even that gives a the same error.

"the analysis has stopped because the solver has exited unexpectedly"

If you could reply soon, it will be greatly appriciated!

[h-master]

In addition to giving rights to the program files folder I gave all the rights to the "program data folder".

Didn't help.

[LKania]

It's clear from your latest posting that the meshing process is encountering an unhandled (and unreported) exception. As the meshing process falls within the larger solver process, the source of the real failure can be a bit obscured. If you could upload the model file itself this would give us something with which to start a more detailed investigation.

[h-master]

Thanks for your help.

I've uploaded two step files. The first sometimes works, the second never.

The materials are aluminum for the tube and water for the void.

The boundry conditions are:

For the inlet you see when you press the home button on the navigation cube

Volume flow rate of 0.12 m3/h

For the inlet below the top tube:

Presure is 0 Pa

Edit:

Uploading the files gives an error. If you could provide your email-adress I will send it.

[LKania]

Can you zip these files and attach under another reply within this thread?

[h-master]

Sorry I couldn't reply faster.

Her is the file.

[Jon.Wilde]

Hi,

Please could you share the CFZ files? We cannot open a CFDST.

Many thanks!

Jon

[LKania]

Your model imports and meshes about as cleanly as one could hope. After importing Standaard.stp, completing the void fill under geometry tools, assigning solid and fluid materials, inlet and outlet BCs, and autosizing, meshing completes without a hitch (see attached). We'll need to see the particulars of your setup via the sharefile to ascertain what might be causing difficulties for you. ZIp the .cfz file and upload at your earliest convenience.

[h-master]

Here it is.

So if I understand right, you can solve whitout any errors?

I included a screenshot as well.

Thnx in advance.

[Jon.Wilde · Accepted solution]

I see the same error as you in CFD2015 SP1 after simply opening your CFZ and pressing 'Solve'.

This does appear to be to do with how the model imports from CAD rather than anything else, a geometry problem and one that we can work around too.

Try turning on Surface Refinement within the meshing window. You will need to press the 'Refine' button after. This works well here, this is your model as you sent it with the tick box on 🙂

[h-master]

Thanks mate

Works fine now

[h-master]

Btw, is there a way to assign more cpu power to the cfd? It uses 40% right now.

Or is it a gpu task?

[scott.werner]

By default CFD will use as many physical cores as exist on the machine. We do not leverage Hyper-Threading (or virtual cores). So if you have Hyper-Threading turned on, (assuming 4 core cpu) we would at most use 50% according to Windows. Windows will report 8 threads, 4 physical cores and 4 virtual.

We set 1 solver per real core. We do NOT solve on the GPU.

[andreak]

Hi, 

I am facing this same problem of my solver exiting unexpectedly all the time. 

It says that my mesh elements has exceeded system resources and I am wondering if that is the problem? 

Could someone please help me with this. 

Thanks. 

[LKania]

The status of your solver process is described in the message window; what messaging do you see there? Does the process fail during meshing? During solver setup? Execution? It would also help if you were to upload the .cfz file for internal review.

[paulxender]

You solved the issue for me too thanks.