Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Problems about Periodic Conditions in the tutorial model “Periodic Boundary Condition”
Posted 10.02.2013, 15:10 GMT-5 RF & Microwave Engineering 8 Replies
Please login with a confirmed email address before reporting spam
Recently I confront one confusion about periodic conditions in the tutorial model - Periodic Boundary Condition. In Periodic Condition, it selects only boundaries 1 and 6 which are parallel with the yz-plane. As you know in the model, the cube should be a repeated cell and certainly repeated on the xy-plane both in the x direction and in the y direction. However, boundaries 1 and 6 only correspond to x direction. So what about repetition in the y direction?
Then I try to select both boundary 1, 6 parallel with yz-plane and boundary 2, 5 parallel with xz-plane in the Periodic Condition. But some problem occurs just as follows:
Errors during multiphysics.
Failed to find destination boundaries or destination selection empty
- Feature: Periodic Condition 1 (pc1)
I don't know why this happens and how to set Periodic Condition that means a repeated cell in the xy-plane both in the x direction and in the y direction.
Thank you so much.
Please login with a confirmed email address before reporting spam
Also make sure your mesh is identical on symmetric BC.
Please login with a confirmed email address before reporting spam
OOOOOOOOOO
OOOOOOOOOO
OOOOOOOOOO
OOOOＯOOOOO
OOOOOOOOOO
OOOOOOOOOO
OOOOOOOOOO
O
O
O
OOOOＯOOOOO
O
O
O
I hope you can understand what I mean for the above pictures. Could you please help me to explain that?
Thank you.
Please login with a confirmed email address before reporting spam
Please login with a confirmed email address before reporting spam
Please login with a confirmed email address before reporting spam
When I set the x direction periodic BC, it will become like this
OOOOOＯOOOOO
When I set the y direction periodic BC, it will become like this
O
O
O
O
Ｏ
O
O
O
O
But when I set both x and y direction periodic BC, what will it be? Probably it can be periodic on the x-y plane.
OOOOOOOOOO
OOOOOOOOOO
OOOOOＯOOOO
OOOOOOOOOO
OOOOOOOOOO
OOOOOOOOOO
However, there exists another probability that it may become a "cross" periodic model just like this
O
O
O
O
ＯOOOOOO
O
O
O
O
So I'm confused about these two probabilities and can't decide which it should be.
Thank you.
Please login with a confirmed email address before reporting spam
Please login with a confirmed email address before reporting spam
Please login with a confirmed email address before reporting spam
I would like to study Periodic condition in Comsol too. However, I can not locate where are the tutorial files of field in Comsol's library. Can you help me ? (Or models in www.comsol.com/models)
Thank you very much
Best regards
Duc