Error
Simulation setup error: patch type ‘patch’ not constraint type ‘empty’
Important
The ‘2D Empty’ type can only be used for a ‘2D Mesh’. Please note that SimScale platform supports 3D mesh generation only. 2D meshes cannot be generated, but can be uploaded via Mesh Upload option (for details see Upload Mesh ).
1- You were attempting a 3D simulation (with a 3D mesh), but a ‘Custom’ boundary condition with type ‘2D Empty’ was specified for a flow variable.
2- You were attempting a 2D simulation by applying ‘2D Empty’ boundary condition but with a 3D mesh.
3- You are attempting a 2D simulation with an uploaded 2D mesh, but either the ‘2D Empty’ boundary condition is incorrectly used or the mesh used does not satisfy 2D criterion according to OpenFOAM standards.
1- For a 3D simulation, check your ‘Custom’ type boundary condition(s) and make sure ‘2D Empty’ is not assigned to any flow variable.
2- For a ‘2D simulation’ you will have to Upload a ‘2D mesh’. Or you can do a ‘pseudo 2D’ simulation with a 3D mesh by applying a ‘Symmetry’ type boundary condition for the faces in the 3rd-dimension.
3- For the uploaded 2D mesh, please make sure that there is only 1 cell in the 3rd- dimension to satisfy a true 2D mesh condition and the base ‘patch types’ for the 3rd-dimension faces are set to type ‘empty’ in the mesh ‘boundary’ file ( found in folder ‘constant/polyMesh’ of the OpenFOAM case setup ). Then in the simulation setup, make sure the ‘2D Empty’ boundary condition is applied to the corresponding 3rd-dimension faces.
Important
For a ‘Case Upload‘: Please make sure that the constant/polyMesh/boundary file is consistent with the boundary condition files in ‘0’ (zero) folder e.g p , U, etc.
Note
If none of the above suggestions did solve your problem, then please post the issue on our forum or contact us.
Last updated: October 2nd, 2020
We appreciate and value your feedback.
