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ERROR #002100013 has occurred in subroutine Chk_Sp

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Old   November 3, 2005, 08:28
Default ERROR #002100013 has occurred in subroutine Chk_Sp
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Hi all,

I am using cfx5.7.1 to do a two modelling. I used symmetry boundaries. Because I don't want more cells on the third direction so the physical distance on the third direction is very small (smaller than the larger cell dimension). Ideally, when I was using structured mesh, only one cell along the third direction and now I have to use unstructured mesh due to the geometry reasons.

There was no problem when I was generating the mesh using ICEM and set the boundary conditions in cfx-pre, only when I run it I got this error (see below). I tried to refine the mesh and used the expert parameters it suggested, but it keeps telling me this.

Does this mean I do need more cells on the third direction in order to make the plane to be a 'strict plane'? If there are more cells in the third direction, am I going to have 3D effects for the calculation? I mean, parameters in the third direction won't be uniform as it is assumed to be.

Thanks for your help

Regards Yingchun

Followed the error message:

ERROR #002100013 has occurred in subroutine Chk_Splane. Message: The symmetry boundary condition requires that the boundary patch mesh faces form a plane or axis. However, face set 14 in the symmetry boundary patch


is not in a strict plane, which means that at least one of its faces is not parallel to the others. To make the solver run you can do one of the following:

(1) Make sure that this symmetry boundary patch is in a plane or

axis by checking and regenerating the mesh.

(2) If the symmetry boundary patch is an axis rather than a

plane, change the tolerance of the degeneracy check by

increasing the value of the Solver Expert Parameter

'degeneracy check tolerance' (the default value is 1.e-4).

(3) Increase the value of the Solver Expert Parameter

'vector parallel tolerance' (the default value is 1 deg.).

Note that the accuracy of the symmetry condition may decrease

as the tolerance is increased. This is because the tolerance

is the number of degrees that a mesh face normal is allowed

to deviate from the average normal for the entire face set.

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