[George2105]

Hey folks,

I am currently modelling a 2D supersonic gas nozzle and I am trying to add a cylindrical work-piece 2mm from the nozzle outlet. I have the nozzle and the cylinder both meshed but I am unsure whether this is the right method for a 2D case or whether I need to re-do the mesh and make it so the work-piece is represented as a lack of space for the air to flow into.

I will copy and paste my blockMeshDict file down below and I would be grateful for any help you can give me as I am very new to openFOAM, I hope I have made it clear what I am trying to do here. If what I have done is correct, I am unsure how to define the frontAndBack of the cylinder as empty to convert it into a 2D circle.

Many thanks in advance.

convertToMeters 0.001;

vertices
(
(0 0 0) //0
(9.03 0 0) //1
(9.03 0 -1) //2
(0 0 -1) //3
(0 -3.45 0) //4
(9.03 -3.45 0) //5
(9.03 -3.45 -1) //6
(0 -3.45 -1) //7
(3.635 -17 0) //8
(5.395 -17 0) //9
(5.395 -17 -1) //10
(3.635 -17 -1) //11
(3.5 -18.5 0) //12
(3.5 -18.5 -1) //13
(5.53 -18.5 0) //14
(5.53 -18.5 -1) //15
(3.5 -38.5 0) //16
(5.53 -38.5 0) //17
(5.53 -38.5 -1) //18
(3.5 -38.5 -1) //19
(-1.5 -18.5 0) //20
(-1.5 -18.5 -1) //21
(-1.5 -38.5 0) //22
(-1.5 -38.5 -1) //23
(10.53 -18.5 0) //24
(10.53 -18.5 -1) //25
(10.53 -38.5 0) //26
(10.53 -38.5 -1) //27

//cylinder work piece

(5.715 -20.5 0) //28
(4.515 -19.3 0) //29
(3.315 -20.5 0) //30
(4.515 -21.7 0) //31
(5.715 -20.5 -1) //32
(4.515 -19.3 -1) //33
(3.315 -20.5 -1) //34
(4.515 -21.7 -1) //35
(4.515 -20.5 0) //36
(4.515 -20.5 -1) //37
);

blocks
(
hex (1 0 3 2 5 4 7 6) (1 1 1) simpleGrading (1 1 1)
hex (5 4 7 6 9 8 11 10) (1 1 1) simpleGrading (1 1 1)
hex (9 8 11 10 14 12 13 15) (1 1 1) simpleGrading (1 1 1)
hex (14 12 13 15 17 16 19 18) (1 1 1) simpleGrading (1 1 1)
hex (12 20 21 13 16 22 23 19) (1 1 1) simpleGrading (1 1 1)
hex (14 24 26 17 15 25 27 18) (1 1 1) simpleGrading (1 1 1)

//cylinder work piece

hex (32 33 37 37 28 29 36 36) (10 10 10) simpleGrading (1 1 1)
hex (33 34 37 37 29 30 36 36) (10 10 10) simpleGrading (1 1 1)
hex (34 35 37 37 30 31 36 36) (10 10 10) simpleGrading (1 1 1)
hex (35 32 37 37 31 28 36 36) (10 10 10) simpleGrading (1 1 1)
);

edges
(
//cylinder work piece

arc 28 29 (5.363528137 -19.65147186 0)
arc 29 30 (3.666471836 -19.65147186 0)
arc 30 31 (3.666471836 -21.34852814 0)
arc 31 28 (5.363528137 -21.34852814 0)

arc 32 33 (5.363528137 -19.65147186 -1)
arc 33 34 (3.666471836 -19.65147186 -1)
arc 34 35 (3.666471836 -21.34852814 -1)
arc 35 32 (5.363528137 -21.34852814 -1)

);

boundary
(
inlet
{
type patch;
faces
(
(0 1 2 3)
);
}

outlet
{
type patch;
faces
(
(26 17 18 27)
(16 17 18 19)
(16 22 23 19)
(20 21 23 22)
(24 26 27 25)
(24 14 15 25)
(12 20 21 13)
);
}

wall
{
type wall;
faces
(
(1 5 6 2)
(0 4 7 3)
(5 9 10 6)
(4 8 11 7)
(9 14 15 10)
(8 12 13 11)

//cylinder work piece

(28 36 36 29)
(29 36 36 30)
(30 36 36 31) //0 z-axis
(31 36 36 28)

(33 37 37 32)
(34 37 37 33)
(35 37 37 34) //-1 z-axis
(32 37 37 35)

(28 29 33 32)
(29 30 33 34)
(30 31 35 34)
(31 28 32 35)
);
}

frontAndBack
{
type empty;
faces
(
(0 1 5 4)
(3 2 6 7)

(4 5 9 8)
(7 6 10 11)

(8 9 14 12)
(11 10 15 13)

(12 14 17 16)
(13 15 18 19)

(12 20 22 16)
(13 21 23 19)

(14 24 26 17)
(15 25 27 18)




);
}
);

mergePatchPairs
(
);