Learning Forum

[wuxuetianzi]

Hi,

I have got an error message once I want to start iteration when parallel process activated. The screenshots are attached 

 

If I deactivate the double-precision, the error becomes to this:

 

This problem keeps happening whether the UDFs used. And the project will be working when I use the serial process even with UDFs.

Hope someone can help out, thanks!

Best

[Rob]

If it works in serial with the UDFs and fails in parallel with the UDFs can you check the model in parallel without the UDFs? What does the UDF do?

[wuxuetianzi]

Thanks for the reply.

This problem still happened in the parallel without UDF.

The UDF is to change diffusivity of mixture.

[DrAmine]

Which Fluent release are you using?

[wuxuetianzi]

Thanks for the reply.

It is 19.0

[DrAmine]

Can you describe case and add some more details?

[wuxuetianzi]

I am using VOF, Solidification, and species transport models to simulate ash melting while some chemical reactions happening. only UDF used so far is the one to change diffusivity. To simplify, it is a 2d, transient, pressure-based, axisymmetric simulation. 

Please let me know if I need to provide any specific details.

Best

[DrAmine]

After reading the case in parallel check if the partition boundary lies at the interface?
Try another number of cpus.

[wuxuetianzi]

Hi Amine,

Thanks for the reply.

I have tried another number of CPUs, it did not work.  Could you tell me more about "the partition boundary lies at the interface"?

Thanks!

Best