[UsamaQ]

Hello,


I was trying to run simulation of a compressor stage with a single fluid sector to reduce computation.

After completing the setup in Cfx-pre, When I try to run the simulation, The solver stops with the following errors.

The ANSYS CFX solver exited with return code 1. No results file |
| has been created.

ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Floating point exception: Overflow |
|

ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Stopped in routine FPX: C_FPX_HANDLER |
|


I am new to CFX and checked various other threads but couldn't find the exact issue. I am using ANSYS 19.2.

[UsamaQ]

+--------------------------------------------------------------------+
| Mesh Statistics |
+--------------------------------------------------------------------+
| Domain Name | Orthog. Angle | Exp. Factor | Aspect Ratio |
+----------------------+---------------+--------------+--------------+
| | Minimum [deg] | Maximum | Maximum |
+----------------------+---------------+--------------+--------------+
| Diff | 35.8 ok | 10 ok | 4 OK |
| Impeller | 3.1 ! | 243 ! | 1435 OK |
| Inlet | 44.8 ok | 10 ok | 4 OK |
| Global | 3.1 ! | 243 ! | 1435 OK |
+----------------------+---------------+--------------+--------------+
| | %! %ok %OK | %! %ok %OK | %! %ok %OK |
+----------------------+---------------+--------------+--------------+
| Diff | 0 <1 100 | 0 2 98 | 0 0 100 |
| Impeller | <1 7 93 | <1 4 96 | 0 0 100 |
| Inlet | 0 <1 100 | 0 1 99 | 0 0 100 |
| Global | <1 6 94 | <1 4 96 | 0 0 100 |
+----------------------+---------------+--------------+--------------+

[UsamaQ]

Update,

So, I tried to run the simulation with different material i.e Air and it converged in 25 iterations. So maybe it is the material that is creating the problem because I added the material manually in the setup. But I think I should add it through an another method like adding through CFX text files.

am I right?

[AtoHM]

It is perfectly fine to add everything in the GUI. I only know one thing that cannot be added in the GUI but must be provided by ccl file ... maybe there are a few more, but in most of the cases you can do everything in the GUI. Overflow is a common issue which can be caused by material and boundary condition settings. Check the forum FAQ on that.

[UsamaQ]

Thank you for the reply.

I am wondering if the problem is due to boundary conditions, it shouldn't work with other material like Air at 25 Celsius. Maybe the error is caused by wrong material properties because I have to use another material and I manually added it in GUI.

[ghorrocks]

Here is the link to the FAQ. It is the place to start: https://www.cfd-online.com/Wiki/Ansy...do_about_it.3F

[UsamaQ]

Yes I checked that thread yesterday. I believe its the material properties that are creating trouble because the same setup with Air works fine which is default. So, I think that's the properties.

Thank you