[omid_aa]

Hello everyone,
I'm new to Converge and I just prepared the example SI_PFI (which is a single cylinder SI engine) for running but I get these warnings and error when I start the run process:

WARNING: there may be an alignment error.
The maximum dot product of the motion vector with a non-moving triangle's normal vector is 9.987867e-001.
For properly aligned moving surfaces, this dot_product should be less than 5.0e-4
The boundary type that appears to not be aligned is WALL, and it is attached to boundary 8, which is moving.
The triangle of maximum alignment error is centered at -3.500823e-002 -1.653867e-002 4.172653e-002
--------------------------------------------------------------------------------------

WARNING: there may be an alignment error.
The maximum dot product of the motion vector with a non-moving triangle's normal vector is 9.998994e-001.
For properly aligned moving surfaces, this dot_product should be less than 5.0e-4
The boundary type that appears to not be aligned is WALL, and it is attached to boundary 14, which is moving.
The triangle of maximum alignment error is centered at 2.972300e-002 -2.234553e-002 4.340323e-002
--------------------------------------------------------------------------------------

JOB ABORT invoked by rank 0:
ERROR: Safe Realloc has detected a null pointer, pointer_size is zu
Please ensure that the system has enough memory
to run this program.


(Boundary 8 and 14 are exhaust and intake valves which are moving parts.)
I don't understand what exactly is wrong with the model. Can someone help me with this please?

Thanks.

[MFGT]

Hi Omid,

the warnings tell you that the valve boundaries might move into a different direction than the valve stem. In other words, the valve stem is not alligned properly. You can simply check this by creating a point a the specifed location where the maximum allignment error is happening.

I would recommend checking the valve_lift.in files and recreate the valve stem. Delete the old cells an connect the open edges via Create->Triangles->Loft directionally (specify the valve opening direction here)

Regarding the error, i am not sure (i never had this one). Do you have enough memory on your system? Although i exceeded mine once by a big amount (110GB of max. 64GB ) and the windows pagefile was used instead of aborting the code.

[omid_aa]

Hi Tobias,
thanks for the reply. It was a great help.