Bounceback boundaries(Physical and lattice coordinates)

[achodankar]

Hello Developers,

This is the present output result for physical and lattice coordinates.

x_p y_p i_lat j_lat
0 0 0 0
0 0.1 0 1
0 0.2 0 2
0 0.3 0 3
0 0.4 0 4
0 0.5 0 5
0 0.6 0 6
0 0.7 0 7
0 0.8 0 8
0 0.9 0 9
0 1 0 10

I thought we should be getting this way while using bounce back boundary conditions:

x_p y_p i_lat j_lat
0 0.05 0 0.5
0 0.1 0 1
0 0.2 0 2
0 0.3 0 3
0 0.4 0 4
0 0.5 0 5
0 0.6 0 6
0 0.7 0 7
0 0.8 0 8
0 0.9 0 9
0 0.95 0 9.5

I understand that lattice coordinates are integers. I would really appreciate your feedback on this matter.

Thank you.

Yours sincerely,

Abhijeet C.

[mathias]

Which example/setup are you talking about?

[achodankar]

Poiseuille2D example

[jjessberger]

Dear Abhijeet,

The numerical geometry (and therefore the physical and lattice coordinates of your grid nodes) does not depend on the boundary conditions (in fact they are set in advance).
Setting some nodes of your domain to a link-wise boundary condition does not change the coordinates of the nodes. Instead, it implies that the actual boundary of the physical domain lies beside these nodes.

Yours sincerely,
Julius J.

[achodankar]

Hello Julius,
I understand now. Thank you for your prompt response.

Thank you.

Yours sincerely,

Abhijeet C.

[Author]

Posts