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Alignment error in engine simulation

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Old   June 27, 2018, 08:11
Post Alignment error in engine simulation
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Sangeeth Sanal
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1850 WARNING:
there may be an alignment error.
The maximum dot product of the motion vector with a non-moving triangle's normal vector is 1.166965e-03.
For properly aligned moving surfaces, this dot_product should be less than 5.0e-4


1851 WARNING: The boundary type that appears to not be aligned is WALL, and it is attached to boundary 1, which is moving.

The triangle of maximum alignment error is centered at -6.137263e-03 4.243868e-02 -3.186973e-02



Hi

What can be a solution for this error in engine simulation. I tried to project vertices from the piston to head but I cant find any alignment error. I can run the simulation with this error/warning, but when I turn on monitor points the simulation just crashes.
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Old   June 29, 2018, 18:55
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Chaitanya Ghodke
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Can you please let me know what is boundary 1? This error is typically a geometry related issue. I suggest make sure that you are using correct valve axes. Can you please check that.
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Old   June 30, 2018, 09:55
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Sangeeth Sanal
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Hi Chaitanya


Thank you for the reply. The error was geometry related. The geometry has just a piston and head. I was able to rectify that by projecting the curve from piston to head.
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