Warning: No Cyclic constraint equations are not created for Thermal DOF’s(Temp)

[loiteringfish]

I tried to create a Steady-State Thermal with Pre-Meshed Cyclic Region setting, but I found that I have no choice to operate this model with REAL CYCLIC. When I run this model, it can be sloved but the answer in two cyclic boundary regions are not matched with wach other, and there is a warning which writes [No Cyclic constraint equations are not created for Thermal DOF's(Temp)].

I wonderd how can I calculate Thermal with Cyclic models correctly ( which means the cyclic regions are matched with each other ) , or it's not availble from the point of software functions? I found the explanation about Thermal constraint in Ansys website which said that [Cyclic symmetry solution does not work for elements that have thermal and hydrostatic pressure degrees of freedom.], you can see that on the pic and the link. https://ansyshelp.ansys.com/public/account/secured?returnurl=/Views/Secured/corp/v251/en/ans_cycsym/advcyclmnt.html

[loiteringfish]

Please help me, or communication is also welcomed!

[Huadong Sun]

According to the help documentation, Cyclic Region and Pre-Meshed Cyclic Region are supported for steady-state thermal analyses. However, in the post-processing stage, only the current individual sector's results can be viewed — the full model results are not available.

If viewing the entire model’s results in post-processing is required, the full model must be built in the pre-processing stage, instead of using cyclic symmetry boundary conditions.

https://ansyshelp.ansys.com/public/account/secured?returnurl=//Views/Secured/corp/v251/en/wb_sim/ds_cyclic_sym_considerations.html

[loiteringfish]

Thanks for your reply. But the problem I encountered is not about the viewing, and I know that the view problem you mentioned can be solved in beta version. My question is about the base algorithm. I meshed the faces in two boundary regions through link function in ANSA, so the nodes in two boundary faces are one-to-one matched, but in my ANSYS Thermal answer, they are not one-to-one matched, there are differences between them. Even the differences are less than 1℃, this condition will also incur unreasonabl stress in boundarys. That is what confused me.

According to the pic you provied, it shows that [the cyclic  symmetry solution in Mechanical APDL does not support elements with thermal DOFs], I think the meaning of this sentence is that the cyclic symmetry is ineffective in any thermal analyize? Or it can work by special settings? 

[Huadong Sun]

Could you please share a screenshot to help illustrate your issue?