There are additional considerations if an Euler Domain or a Particle Domain is defined for an analysis. For symmetry to be applied to an Euler Domain or a Particle Domain, symmetry will have to be defined with the global coordinate system, not a local one, and it will need to be applied on geometry faces which lie on the global coordinate system planes. An additional constraint for particle bodies is that the symmetry region cannot be scoped to Particle bodies themselves. Therefore, to ensure symmetry in an analysis with Particle bodies, the symmetry region needs to be applied to another body in the analysis.
If the symmetry is not defined with the global coordinate system, it is ignored and a warning is shown in the messages window saying that such symmetry will be ignored but the analysis continues to solve.
If the symmetry is not applied on faces which lie on the global coordinate system planes then an error is shown and the solution is terminated.
In the case where symmetry is valid for use with Euler Domains, if the boundary of the Euler Domain which is parallel to the symmetry plane is below the symmetry plane, then that boundary will be moved to lie on the symmetry plane if the following conditions are true:
The Euler Domain Size Definition option in the Analysis settings is set to Program Controlled.
The Euler body is on the positive side of the global coordinate axis.