[Adam404]

Hello, everytime I try to run the calculation, I receive this error:
Error: received a fatal signal (Segmentation fault).
Error Object: #f

I am not sure what object: #f is and so I am not sure what part of the file is not working. Any help would be greatly appreciated!

Regards,
Adam

[AlexanderZ]

it means you are trying to access memory, which is not allocated

best regards

[Adam404]

Originally Posted by AlexanderZ

it means you are trying to access memory, which is not allocated

best regards

Okay, thank you. How do i allocate memory? I was running the program on the university's virtual desktop and have now switched to just the normal desktop, and I am still getting the same error.

[pakk]

It depends on which memory you are trying to access.


You have not really given enough details on your simulation to determine this. Are you using UDFs (functions)? Are you using UDS (scalars)? Are you using UDMs (memory locations)?

[Adam404]

Originally Posted by pakk

It depends on which memory you are trying to access.


You have not really given enough details on your simulation to determine this. Are you using UDFs (functions)? Are you using UDS (scalars)? Are you using UDMs (memory locations)?

I am using all three that you have listed, as they are part of the PEM fuel cell addon module. What other information would you need?

[pakk]

Disable them all three. Do you still have a problem?
If not, turn one of them back on, and check. Do you still have a problem?
In this way, pinpoint the one that gives the problem.


If it is the UDF, and you have more than one function, use only one. Does it give a problem? If not, use another one. Does it give a problem? Find out which one contains the problem.


If you know which function gives the problem, and you can not fix it, post it here.

[Adam404]

thank you! i will try this tomorrow

[AlexanderZ]

my recommendation for you:
there are tutorials on PEM simulations in Fluent,
go through it step by step

best regards

[maiyuebing]

Originally Posted by Adam404

thank you! I will try this tomorrow

Hi, I have the same situation as you. May I ask how did you solve it?

Thank you in advance.

[pakk]

If your problem is "received a fatal signal (Segmentation fault)", then although you had the same error message, your problem is almost surely not "the same" as Adam404's problem.


Adam404's solution could be that he changed something in line 387 of his code, but that does not mean that you have to change the same line.




The best advice I can give to you (maiyuebing) is to find out where your problem is. Make your simulation simpler, switch off models, until you find out which part of your simulation is causing the problem.

[maiyuebing]

Originally Posted by pakk

If your problem is "received a fatal signal (Segmentation fault)", then although you had the same error message, your problem is almost surely not "the same" as Adam404's problem.


Adam404's solution could be that he changed something in line 387 of his code, but that does not mean that you have to change the same line.




The best advice I can give to you (maiyuebing) is to find out where your problem is. Make your simulation simpler, switch off models, until you find out which part of your simulation is causing the problem.

Thank you for your advice, how can I simulate the fuel cell model without using the PEM modules?

By the way, how to find out the code of my simulation?

Thank you

[pakk]

Originally Posted by maiyuebing

Thank you for your advice, how can I simulate the fuel cell model without using the PEM modules?

You can't, but you can run the simulation without the module, just to see what happens. Disregard the result, only check if you get an error or not.

By the way, how to find out the code of my simulation?

Thank you

If you added code to your simulation, you would know which code you added. If you have to ask which code you added, you probably don't have code.

[maiyuebing]

Originally Posted by pakk

You can't, but you can run the simulation without the module, just to see what happens. Disregard the result, only check if you get an error or not.

If you added code to your simulation, you would know which code you added. If you have to ask which code you added, you probably don't have code.

I have been finished the previous problem. However, when I start to calculate the model it shows Divergence detected in AMG solver: species-2.

Sometimes, the model can be calculated, some not. Could you give me some suggestion?

[AlexanderZ]

I recommend you to make your model works well in all cases.

if you need help on that, you must describe your problem, steps which lead to this problem, show logs and errors

best regards