Learning Forum

[domali]

Hi everyone!

I was following the "ANSYS Internal Combustion Engines Tutorial Guide" for a Cold Flow Simulation, but I can't solve the simulation in Fluent, despite following the step by step guide. I tried to start Fluent both in serial and in parallel but I still have the same problem "Divergence detected in AMG solver: epsilon" that appears to me immediately, after Run calculations. Could anyone help me?

Mesh quality:

Minimum Orthogonal Quality = 1.02723e-01 cell 171690 on zone 19 (ID: 519561 on partition: 0) at location (-1.07404e-02 -2.40508e-02 1.01766e-02)

(To improve Orthogonal quality , use "Inverse Orthogonal Quality" in Fluent Meshing,

where Inverse Orthogonal Quality = 1 - Orthogonal Quality)

Maximum Aspect Ratio = 3.83419e+01 cell 91119 on zone 19 (ID: 438990 on partition: 0) at location (-1.71643e-02 -2.71369e-02 4.07555e-02)

Thanks a lot.

Down here in Parallel

[RK]

Hello, nWhich version of Ansys fluent tutorial are you refereeing to and which version are you using to simulate? n

[domali]

Hello, Which version of Ansys fluent tutorial are you refereeing to and which version are you using to simulate?https://forum.ansys.com/discussion/comment/104576#Comment_104576

Hi, I'm using Ansys 19.2 and I'm referring to this tutorial, the cold flow partnArrayn

[RK]

As Ansys Employees, we will not be able to download any attachments. Which version of the tutorial are you referring to? It would help if you could insert an image of the first page and the page with problem description. n

[domali]

Ok,here they arenn

[RK]

You are referring to version 16.0 tutorial and performing the simulation in 19.2, hence there might be some difference. However, you might want to reduce the under relaxation factor initially until the solution stabilizes and then increase it to the default value. n

[domali]

Thank you for your advice but I've already tried to reduce the under relaxation factors, and I've always the same problem of divergence for epsilon..n