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August 22, 2016, 12:44 |
joining two cylinders
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#1 |
New Member
Sergio
Join Date: Jul 2016
Location: Venezuela
Posts: 13
Rep Power: 10 |
Hi everyone.
I'm trying to join a small cylinder with a venturi tube. When I made the venturi tube all faces were connected using " matching faces" but the face between venturi tube and the cylinder was not connected, and I don't know why. So I would like to know which is the correct way to unit them. Here is my mesh: convertToMeters 0.001; vertices ( (0 0 16) // 0 (0 16 0) // 1 (0 0 -16) // 2 (0 -16 0) // 3 (40 0 16) // 4 (40 16 0) // 5 (40 0 -16) // 6 (40 -16 0) // 7 (60.840712 0 8) // 8 (60.840712 8 0) // 9 (60.840712 0 -8) // 10 (60.840712 -8 0) // 11 (76.840712 0 8) // 12 (76.840712 8 0) // 13 (76.840712 0 -8) // 14 (76.840712 -8 0) // 15 (141.995484 0 16) // 16 (141.995484 16 0) // 17 (141.995484 0 -16) // 18 (141.995484 -16 0) // 19 (182 0 16) // 20 (182 16 0) // 21 (182 0 -16) // 22 (182 -16 0) // 23 (65.840712 8 0) // 24 (71.840712 8 0) // 25 (68.840712 7.416198487 3) // 26 (68.840712 7.416198487 -3) // 27 (65.840712 12 0) // 28 (71.840712 12 0) // 29 (68.840712 12 3) // 30 (68.840712 12 -3) // 31 ); blocks ( hex (0 3 2 1 4 7 6 5) (60 40 40) simpleGrading (1 1 1) hex (4 7 6 5 8 11 10 9) (60 40 40) simpleGrading (1 1 1) hex (8 11 10 9 12 15 14 13) (60 40 40) simpleGrading (1 1 1) hex (12 15 14 13 16 19 18 17) (60 40 40) simpleGrading (1 1 1) hex (16 19 18 17 20 23 22 21) (60 40 40) simpleGrading (1 1 1) hex (28 31 29 30 24 27 25 26) (60 40 40) simpleGrading (1 1 1) ); edges ( arc 0 1 (0 11.3137085 11.3137085) arc 1 2 (0 11.3137085 -11.3137085) arc 2 3 (0 -11.3137085 -11.3137085) arc 3 0 (0 -11.3137085 11.3137085) arc 4 5 (40 11.3137085 11.3137085) arc 5 6 (40 11.3137085 -11.3137085) arc 6 7 (40 -11.3137085 -11.3137085) arc 7 4 (40 -11.3137085 11.3137085) arc 8 9 (60.840712 5.656854 5.656854) arc 9 10 (60.840712 5.656854 -5.656854) arc 10 11 (60.840712 -5.656854 -5.656854) arc 11 8 (60.840712 -5.656854 5.656854) arc 12 13 (76.840712 5.656854 5.656854) arc 13 14 (76.840712 5.656854 -5.656854) arc 14 15 (76.840712 -5.656854 -5.656854) arc 15 12 (76.840712 -5.656854 5.656854) arc 16 17 (141.995484 11.3137085 11.3137085) arc 17 18 (141.995484 11.3137085 -11.3137085) arc 18 19 (141.995484 -11.3137085 -11.3137085) arc 19 16 (141.995484 -11.3137085 11.3137085) arc 20 21 (182 11.3137085 11.3137085) arc 21 22 (182 11.3137085 -11.3137085) arc 22 23 (182 -11.3137085 -11.3137085) arc 23 20 (182 -11.3137085 11.3137085) arc 24 26 (70.962032 8 2.121320) arc 26 25 (70.962032 8 -2.121320) arc 25 27 (66.719392 8 -2.121320) arc 27 24 (66.719392 8 2.121320) arc 28 30 (70.962032 12 2.121320) arc 30 29 (70.962032 12 -2.121320) arc 29 31 (66.719392 12 -2.121320) arc 31 28 (66.719392 12 2.121320) ); boundary ( inlet { type patch; faces ( (0 3 2 1) ); } outlet { type patch; faces ( (20 23 22 21) ); } rightup { type wall; faces ( (0 1 5 4) (4 5 9 8) (12 13 17 16) (16 17 21 20) (8 9 13 12) ); } leftup { type wall; faces ( (1 2 6 5) (5 6 10 9) (13 14 18 17) (17 18 22 21) (9 10 14 13) ); } rightdown { type wall; faces ( (0 3 7 4) (4 7 11 8) (8 11 15 12) (12 15 19 16) (16 19 23 20) ); } leftdown { type wall; faces ( (2 3 7 6) (6 7 11 10) (10 11 15 14) (14 15 19 18) (18 19 23 22) ); } atmosfera { type patch; faces ( (30 29 31 28) ); } smallcylinder { type wall; faces ( (24 28 30 26) (26 30 29 25) (25 29 31 27) (27 31 28 24) ); } ); mergePatchPairs ( ); I also read about mergePatchPairs to join two blocks but I don't have much experience with blockmesh so I don't know if I can connect the face (24 26 25 27) "output small cylinder" with the venturi tube because the entrance to the venturi tube is composed of two faces (8 9 13 12) and (9 10 14 13). I would appreciate any help. |
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August 29, 2016, 16:41 |
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#2 |
New Member
Sergio
Join Date: Jul 2016
Location: Venezuela
Posts: 13
Rep Power: 10 |
Hi to all.
I could join the two cylinders but when run checkMesh got the following error: Overall domain bounding box (0 -0.016 -0.016) (0.182 0.016 0.016) Mesh has 3 geometric (non-empty/wedge) directions (1 1 1) Mesh has 3 solution (non-empty) directions (1 1 1) Boundary openness (6.47596e-17 -3.05627e-15 -5.28774e-15) OK. Max cell openness = 3.75848e-16 OK. Max aspect ratio = 320.738 OK. Minimum face area = 4.86213e-12. Maximum face area = 1.39607e-06. Face area magnitudes OK. Min volume = 2.85515e-14. Max volume = 7.9738e-10. Total volume = 0.000108115. Cell volumes OK. Mesh non-orthogonality Max: 88.6173 average: 22.2726 *Number of severely non-orthogonal (> 70 degrees) faces: 19832. Non-orthogonality check OK. <<Writing 19832 non-orthogonal faces to set nonOrthoFaces ***Error in face pyramids: 12 faces are incorrectly oriented. <<Writing 12 faces with incorrect orientation to set wrongOrientedFaces ***Max skewness = 4.97893, 2 highly skew faces detected which may impair the quality of the results <<Writing 2 skew faces to set skewFaces Coupled point location match (average 0) OK. Failed 2 mesh checks. End I changed the order of vertices and blocks because was getting 3 errors more, but now I don't know where the error is. Here is my mesh: vertices ( (0 0 16) // 0 (0 -16 0) // 1 (0 0 -16) // 2 (0 16 0) // 3 (40 0 16) // 4 (40 -16 0) // 5 (40 0 -16) // 6 (40 16 0) // 7 (60.840712 0 8) // 8 (60.840712 -8 0) // 9 (60.840712 0 -8) // 10 (60.840712 8 0) // 11 (76.840712 0 8) // 12 (76.840712 -8 0) // 13 (76.840712 0 -8) // 14 (76.840712 8 0) // 15 (141.995484 0 16) // 16 (141.995484 -16 0) // 17 (141.995484 0 -16) // 18 (141.995484 16 0) // 19 (182 0 16) // 20 (182 -16 0) // 21 (182 0 -16) // 22 (182 16 0) // 23 (68.840712 16 3) // 24 (65.840712 16 0) // 25 (68.840712 16 -3) // 26 (71.840712 16 0) // 27 (68.840712 7.416198487 3) // 28 (65.840712 8 0) // 29 (68.840712 7.416198487 -3) // 30 (71.840712 8 0) // 31 ); blocks ( hex (0 1 2 3 4 5 6 7) (60 40 40) simpleGrading (1 1 1) hex (4 5 6 7 8 9 10 11) (60 40 40) simpleGrading (1 1 1) hex (8 9 10 11 12 13 14 15) (60 40 40) simpleGrading (1 1 1) hex (12 13 14 15 16 17 18 19) (60 40 40) simpleGrading (1 1 1) hex (16 17 18 19 20 21 22 23) (60 40 40) simpleGrading (1 1 1) hex (24 25 26 27 28 29 30 31) (60 40 40) simpleGrading (1 1 1) ); edges ( arc 0 1 (0 -11.3137085 11.3137085) arc 1 2 (0 -11.3137085 -11.3137085) arc 2 3 (0 11.3137085 11.3137085) arc 3 0 (0 11.3137085 11.3137085) arc 4 5 (40 -11.3137085 11.3137085) arc 5 6 (40 -11.3137085 -11.3137085) arc 6 7 (40 11.3137085 -11.3137085) arc 7 4 (40 11.3137085 11.3137085) arc 8 9 (60.840712 -5.656854 5.656854) arc 9 10 (60.840712 -5.656854 -5.656854) arc 10 11 (60.840712 5.656854 -5.656854) arc 11 8 (60.840712 5.656854 5.656854) arc 12 13 (76.840712 -5.656854 5.656854) arc 13 14 (76.840712 -5.656854 -5.656854) arc 14 15 (76.840712 5.656854 -5.656854) arc 15 12 (76.840712 5.656854 5.656854) arc 16 17 (141.995484 -11.3137085 11.3137085) arc 17 18 (141.995484 -11.3137085 -11.3137085) arc 18 19 (141.995484 11.3137085 -11.3137085) arc 19 16 (141.995484 11.3137085 11.3137085) arc 20 21 (182 -11.3137085 11.3137085) arc 21 22 (182 -11.3137085 -11.3137085) arc 22 23 (182 11.3137085 -11.3137085) arc 23 20 (182 11.3137085 11.3137085) arc 24 25 (66.719392 16 2.121320) arc 25 26 (66.719392 16 -2.121320) arc 26 27 (70.962032 16 -2.121320) arc 27 24 (70.962032 16 2.121320) arc 28 29 (66.719392 8 2.121320) arc 29 30 (66.719392 8 -2.121320) arc 30 31 (70.962032 8 -2.121320) arc 31 28 (70.962032 8 2.121320) ); boundary ( inlet { type patch; faces ( (0 1 2 3) ); } outlet { type patch; faces ( (20 21 22 23) ); } rightup { type wall; faces ( (0 3 7 4) (4 7 11 8) (12 15 19 16) (16 19 23 20) ); } leftup { type wall; faces ( (3 2 6 7) (7 6 10 11) (15 14 18 19) (19 18 22 23) ); } rightdown { type wall; faces ( (1 0 4 5) (5 4 8 9) (9 8 12 13) (13 12 16 17) (17 16 20 21) ); } leftdown { type wall; faces ( (2 1 5 6) (6 5 9 10) (10 9 13 14) (14 13 17 18) (18 17 21 22) ); } atmosfera { type patch; faces ( (24 25 26 27) ); } smallcylinder { type wall; faces ( (25 24 28 29) (26 25 29 30) (26 27 31 30) (27 24 28 31) ); } masterPatch { type patch; faces ( (28 29 30 31) ); } slavePatch { type wall; faces ( (8 11 15 12) (11 10 14 15) ); } ); mergePatchPairs ( (masterPatch slavePatch) ); Can someone help me? Please. |
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