Learning Forum

[kuvodich]

1. Hello, I am trying to create a periodic cyclic condition between two faces of a rotating zone for a fan simulation. I want to use the conformal method in fluent, so the mesh needs to match exactly between the two faces. I am creating the mesh using the ansys workbench workflow. The mesh, by default, does not match. I am trying to use match control, but get the "cannot find matching topology" error. The only option for axis of rotation is "global coordinate system." Why can I not specify the axis of rotation (should be global X-axis in my case, see attached image)? I tried creating a new coordinate system, including a cylindrical one, but this still does not work. I am also specifying tetrahedrons for the patch conforming method.

2. As an additional question, is there a way (in ansys meshing or fluent interface) to get the coordinates of the center of an arc edge or cylindrical surface to verify the coordinates of the center of rotation? In my case , I have a "pie slice" geometry but no vertices or geometry exist at the origin to select and view coordinates. I want to ensure the center of my pie slice domain is on the global X-axis with coordinates (arbitrary, 0, 0).

Help appreciated, thanks!

[Petros]

Hi, the Match Control has some requirements which you can ensure are met before proceeding. Also when using Cyclic Match Control, a coordinate system with its z-axis aligned to the axis of rotation for the geometry must be selected. Since in your geometry this does not seem to be the case, create a new coordinate system where its z-axis is aligned with the global x-axis.

You can get information regarding the center of an arc by selecting it, and going to Home→Tools→Selection Information, or by clicking at the corresponding section of the blue bar at the bottom.