[karma15]

Hello everyone,

The answer to this question is most likely straightforward, but I am stuck when trying to build my blockMeshDict. Right now I just have a simple rectangular conduit with an inlet on one side and the outlet on the other side. I would like to have a port on the top wall that will have the boundary condition of negative or positive velocity. So I have a wall on the top, and a wall on the bottom, and within the top wall, I would like a small square to be the "port." I keep getting errors when trying to build the mesh, in particular my error says:

face 0 in patch 4 does not have neighbour cell face: 4(8 9 10  11)

I am thinking that the problem is that I only have one block in my whole domain. Thus, do I need to create separate blocks for each section (i.e. the section before the port, the section with the port, and the section after the port)? Or is there an easier way of doing this?

Here is my blockMeshDict code:

convertToMeters 1;

vertices
(
    (-0.05 -0.05 -0.05) //0
    (10.05 -0.05 -0.05) //1
    (10.05 1.05 -0.05) //2
    (-0.05 1.05 -0.05) //3
    (-0.05 -0.05 0.05) //4
    (10.05 -0.05 0.05) //5
    (10.05 1.05 0.05) //6
    (-0.05 1.05 0.05) //7
    
    (3.85 1.05 -0.05) //8
    (4.15 1.05 -0.05) //9
    (4.15 1.05 0.05)  //10   
    (3.85 1.05  0.05) //11
);


blocks          
(
    hex (0 1 2 3 4 5 6 7) (101 11 1) simpleGrading (1 1 1)
);

edges           
(
);

boundary
(
    wall_top
    {
        type wall;  
        faces
        (
            (3 7 6 2)
        );
    }   
    wall_bottom
    {
        type wall;
        faces
        (
            (4 0 1 5)
        );
    }
    frontAndBack
    {
        type empty;
        faces
        (
            (0 3 2 1)
            (4 5 6 7)
        )
    }
    inlet 
    {
        type patch;
        faces
        (
            (0 4 7 3)
         );
    }
    outlet
    {
        type patch;
        faces
        (
            (2 6 5 1)
        );
    }
    port
    {
        type patch;
        faces
        (
            (8 11 10 9)
        );
    }

mergePatchPairs
(
);

[Antimony]

Hi,

There are two ways of doing this.

1. Define extra points and define the wall_top as all faces except the ones that define "port"

2. Use topoSet to create a faceSet based on the vertices 8 through 11 and use createPatch to create a patch from that. See attached files.

Hope this helps.

Cheers,
Antimony