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September 4, 2014, 04:22 |
AMI: Patch Error
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#1 |
Member
Abhijit
Join Date: Jul 2014
Posts: 75
Rep Power: 11 |
hi everyone
I tried simulating a compressor fan using rhoPimpleDyMFoam solver with cyclicAMI similar to the propeller case in tutorials compressor model was taken from grabCAD and meshed using snappyHexMesh. My simulation stops after few iterations showing this Code:
solidBodyMotionFunctions::rotatingMotion::transformation(): Time = 0.00456585764 transformation: ((0 0 0) (0.9999348537 (0 0.01141439623 0))) AMI: Creating addressing and weights between 97715 source faces and 98899 target faces AMI: Patch source sum(weights) min/max/average = 0.9465117834, 1.489766105, 1.00385493 AMI: Patch target sum(weights) min/max/average = 0, 1.237839515, 0.9988507935 - selecting cells using cellZone rotor - selected 969022 cell(s) with volume 106.5179144 - selecting cells using cellZone rotor - selected 969022 cell(s) with volume 106.5179144 Code:
Create time Create polyMesh for time = 0 Time = 0 Mesh stats points: 2398293 faces: 6465121 internal faces: 6099705 cells: 2046246 faces per cell: 6.140427886 boundary patches: 7 point zones: 0 face zones: 1 cell zones: 1 Overall number of cells of each type: hexahedra: 1793073 prisms: 45780 wedges: 0 pyramids: 0 tet wedges: 1205 tetrahedra: 20 polyhedra: 206168 Breakdown of polyhedra by number of faces: faces number of cells 4 27401 5 15343 6 21408 7 41930 8 22494 9 56038 10 618 12 13871 15 6600 18 460 21 5 Checking topology... Boundary definition OK. Cell to face addressing OK. Point usage OK. Upper triangular ordering OK. Face vertices OK. *Number of regions: 2 The mesh has multiple regions which are not connected by any face. <<Writing region information to "0/cellToRegion" <<Writing region 0 with 1077224 cells to cellSet region0 <<Writing region 1 with 969022 cells to cellSet region1 Checking patch topology for multiply connected surfaces... Patch Faces Points Surface topology frontAndBack 1800 1922 ok (non-closed singly connected) outlet 900 961 ok (non-closed singly connected) inlet 11880 12105 ok (non-closed singly connected) walls 19521 19937 ok (non-closed singly connected) compressor1 134701 160487 ok (non-closed singly connected) rotor 97715 98002 ok (non-closed singly connected) rotor_slave 98899 99288 ok (non-closed singly connected) Checking geometry... Overall domain bounding box (-5 -6 -4) (5 4 4) Mesh (non-empty, non-wedge) directions (1 1 1) Mesh (non-empty) directions (1 1 1) Boundary openness (-2.080673282e-18 1.194170072e-15 -1.766463148e-17) OK. Max cell openness = 3.489719775e-16 OK. Max aspect ratio = 12.24054109 OK. Minimum face area = 8.076153166e-05. Maximum face area = 0.1141694343. Face area magnitudes OK. Min volume = 1.05758803e-06. Max volume = 0.03044330579. Total volume = 774.202411. Cell volumes OK. Mesh non-orthogonality Max: 63.30604426 average: 8.876566052 Non-orthogonality check OK. Face pyramids OK. Max skewness = 1.716941667 OK. Coupled point location match (average 0) OK. Mesh OK. End Thanks Last edited by Jetfire; September 10, 2014 at 01:55. |
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September 8, 2014, 01:50 |
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#2 |
Member
Abhijit
Join Date: Jul 2014
Posts: 75
Rep Power: 11 |
Can someone please help me with this , I'm stuck with this error for days.
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September 9, 2014, 10:46 |
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#3 |
Member
Join Date: Jun 2012
Posts: 76
Rep Power: 13 |
So this error appears after a few iterations? Maybe the axis of rotation is not correct, so that the cells are not rotated correctly?
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September 10, 2014, 00:45 |
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#4 |
Member
Abhijit
Join Date: Jul 2014
Posts: 75
Rep Power: 11 |
@maHein
Thanks for your reply For my rotation : origin (0 0 0) and Axis is (0 1 0 ). Please check the pictures attached and let me know if there are any changes in these parameters. |
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September 10, 2014, 02:52 |
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#5 |
Member
Join Date: Jun 2012
Posts: 76
Rep Power: 13 |
Origin and axis seem to be okay.
Where are your cyclicAMI interfaces? After the trailing edge of the compressor wheel? |
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September 10, 2014, 03:44 |
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#6 |
Member
Abhijit
Join Date: Jul 2014
Posts: 75
Rep Power: 11 |
Yes
I have enclosed the compressor with a cylinder. check the pictures attached. Let me know if you need anything else to check what the problem is. |
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September 11, 2014, 03:55 |
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#7 |
Senior Member
Paritosh Vasava
Join Date: Oct 2012
Location: Lappeenranta, Finland
Posts: 732
Rep Power: 22 |
Do you have access to Anysys products? Fluent, Gambit etc??
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September 11, 2014, 03:59 |
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#8 |
Member
Abhijit
Join Date: Jul 2014
Posts: 75
Rep Power: 11 |
I have access to Ansys ICEM CFD.
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September 11, 2014, 04:39 |
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#9 |
Senior Member
Paritosh Vasava
Join Date: Oct 2012
Location: Lappeenranta, Finland
Posts: 732
Rep Power: 22 |
The error may be due to the fact that your 'rotor' and 'rotor-slave' do not match at the interface/cyclic-AMI. I usually use Ansys-Meshing to avoid this error and for better matching of boundaries at the interface.
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September 11, 2014, 06:06 |
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#10 |
Member
Abhijit
Join Date: Jul 2014
Posts: 75
Rep Power: 11 |
@vasava
Thanks for your reply , i figured it out that it was my meshing problem but checkMesh says everything OK. Anyways il try out Ansys icem for meshing. |
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