[MNMK]

Hi,

I have a simulation model that includes Rotor and stator. I simulated the model once with simple Geometry( firstly, I ignored other components in my model) and it worked well. The second time, I had other components in my model which increased my mesh number to 21 M. This time I have got the error. See below:


+--------------------------------------------------------------------+
| Initial Memory Allocation (Actual usage may vary) |
+--------------------------------------------------------------------+

| Real | Integer | Character | Logical | Double
----------+------------+------------+-----------+----------+----------
Mwords | 130.97 | 2030.62 | 8.56 | 0.12 | 0.00
Mbytes | 999.19 | 7746.20 | 8.17 | 0.46 | 0.00
----------+------------+------------+-----------+----------+----------


+--------------------------------------------------------------------+
| Host Memory Information (Mbytes): Partitioner |
+--------------------------------------------------------------------+
| Host | System | Allocated | % |
+-------------------------+----------------+----------------+--------+
| s1000sap026.cluster | 95145.39 | 8754.01 | 9.20 |
+-------------------------+----------------+----------------+--------+

+--------------------------------------------------------------------+
| The MeTiS partitioning method allocates additional memory. |
| Total memory usage will therefore exceed the values shown above. |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| Topology Simplification |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| ****** Warning ****** |
| |
| Topology simplification is activated with the following |
| restrictions: |
| |
| - Mesh regions referenced only within User Fortran and NOT |
| in the command file will cause the solver to stop. |
| - The solver will stop during any "Edit Run in Progress" step |
| if new 2D regions are referenced. |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| Mesh Statistics |
+--------------------------------------------------------------------+

Domain Name : Rotor

Total Number of Nodes = 891746

Total Number of Elements = 2878437
Total Number of Tetrahedrons = 1851373
Total Number of Prisms = 1016893
Total Number of Pyramids = 10171

Total Number of Faces = 279348

Domain Name : Stator

Total Number of Nodes = 20352771

Total Number of Elements = 89005017
Total Number of Tetrahedrons = 80692277
Total Number of Prisms = 8162511
Total Number of Pyramids = 150229

Total Number of Faces = 10900630

Global Statistics :

Global Number of Nodes = 21244517

Global Number of Elements = 91883454
Total Number of Tetrahedrons = 82543650
Total Number of Prisms = 9179404
Total Number of Pyramids = 160400

Global Number of Faces = 11179978

Domain Interface Name : RSDown

Discretization type = GGI
Intersection type = Direct
Non-overlap area fraction on side 1 = 2.21E-03
Non-overlap area fraction on side 2 = 8.08E-04
Pitch ratio ( pitch side 1 / pitch side 2 ) = 1.000
Pitch angle for side 1 [degrees] = 360.000
Pitch angle for side 2 [degrees] = 360.000

Domain Interface Name : RSIN

Discretization type = GGI
Intersection type = Direct
Non-overlap area fraction on side 1 = 1.34E-02
Non-overlap area fraction on side 2 = 5.24E-03
Pitch ratio ( pitch side 1 / pitch side 2 ) = 1.000
Pitch angle for side 1 [degrees] = 360.000
Pitch angle for side 2 [degrees] = 360.000

Domain Interface Name : RSOutH

Discretization type = GGI
Intersection type = Direct
Non-overlap area fraction on side 1 = 0.00E+00
Non-overlap area fraction on side 2 = 0.00E+00
Pitch ratio ( pitch side 1 / pitch side 2 ) = 1.000
Pitch angle for side 1 [degrees] = 360.000
Pitch angle for side 2 [degrees] = 360.000

Domain Interface Name : RSOutV

Discretization type = GGI
Intersection type = Direct
Non-overlap area fraction on side 1 = 0.00E+00
Non-overlap area fraction on side 2 = 0.00E+00
Pitch ratio ( pitch side 1 / pitch side 2 ) = 1.000
Pitch angle for side 1 [degrees] = 360.000
Pitch angle for side 2 [degrees] = 360.000

+--------------------------------------------------------------------+
| Vertex Based Partitioning |
+--------------------------------------------------------------------+

Coupled partitioning of domains:
Rotor
Stator

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Signal caught: Abnormal termination |
| |
| |
| |
| |
| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Stopped in routine FPX: SIG_HANDLER |
| |
| |
| |
| |
| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| An error has occurred in cfx5solve: |
| |
| The ANSYS CFX partitioner exited with return code 1. |
+--------------------------------------------------------------------+


+--------------------------------------------------------------------+
| The following user files have been saved in the directory |
| /home/simulation/c6xsy8e9.bv9/CFX_017: |
| |
| trace |
+--------------------------------------------------------------------+


+--------------------------------------------------------------------+
| Warning! |
| |
| After waiting for 60 seconds, 1 solver manager process(es) appear |
| not to have noticed that this run has ended. You may get errors |
| removing some files if they are still open in the solver manager. |
+--------------------------------------------------------------------+


This run of the ANSYS CFX Solver has finished.


----------------------------


I use a cluster and also 32 cores. I have tried to increase the memory size to solve the problem but it has not worked. I am grateful when somebody helps me to solve the problem.



regards,

[Gert-Jan]

The error messages are not very helpful. The problem can be anywhere.
Therefore, you should change several things to learn what works and what not. This might lead you to the real problem.

The error occurs in the partitioning. Therefore:
- did you specifically change the memory allocation for the partitioning stage?
- Have you looked at the Detailed Memory Overides? I sometimes have to change Catalog Size. Then I use 10x. Might be too much, but who cares....?
- You are using MeTiS as default partitioning method. Have you tried a different partitioning method? Like Recursive Bisection, Radial, or whatsoever. By changing this, you might learn more of where it goes wrong.
- What if you allocate 30 cores?

[MNMK]

Originally Posted by Gert-Jan

The error messages are not very helpful. The problem can be anywhere.
Therefore, you should change several things to learn what works and what not. This might lead you to the real problem.

The error occurs in the partitioning. Therefore:
- did you specifically change the memory allocation for the partitioning stage?
- Have you looked at the Detailed Memory Overides? I sometimes have to change Catalog Size. Then I use 10x. Might be too much, but who cares....?
- You are using MeTiS as default partitioning method. Have you tried a different partitioning method? Like Recursive Bisection, Radial, or whatsoever. By changing this, you might learn more of where it goes wrong.
- What if you allocate 30 cores?

Thanks a lot. I will do it. I have found many questions about it in forum but nobody wrote a clear solution. When I find it I will report it here.

[Opaque]

If you read at the bottom of the output file, there is a reference to a file named "trace".

Contact Ansys CFX support, and mention the error and the presence of the trace file. If you provide the file, they can track where the software failed, and likely estimate/guess what the problem might be.