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BlockMesh: Strange interface between blocks

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Old   May 25, 2010, 20:42
Default BlockMesh: Strange interface between blocks
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Daniel
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Hello all,
I am a beginner at OF1.6 and I am struggling to understand the problem with a C-grid I created for an airfoil. As shown in the pictures of the mesh, the interface between blocks 0-1 and 2-3 feature a "crossover" of the mesh from one surface of the 2-D mesh to the other. I do not get any errors when running blockMesh or paraView, yet this inconsistency persists. I would appreciate any help you could offer.

Regards,

Dan
Attached Images
File Type: jpg Airfoil1.jpg (32.8 KB, 24 views)
File Type: jpg Airfoil2.jpg (43.9 KB, 22 views)
Attached Files
File Type: pdf Mesh Generator.pdf (8.7 KB, 19 views)
File Type: zip blockMeshDict.zip (3.4 KB, 5 views)
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Old   May 26, 2010, 19:23
Default Found problem
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Daniel
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I apologize for bothering the board with a rookie error. For those who are curious, I had not defined the blocks with a right-hand coordinate system as required in User Guide page U-134. It was convenient to use left-handed coordinate systems in some blocks so that I could use the same expansion ratio in the y-direction for all blocks. Now it is a matter of using the inverse expansion ratio for the blocks I had arranged in a left-handed coordinate system.

Dan
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Old   June 8, 2010, 10:01
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Right. BlockMesh is strict on how you define your blocks.

Are you attempting to reproduce the Fluent tutorial for an airfoil? Seems like you have quite a coarse mesh, and to be "missing" a mesh-section behind the airfoil. But you might parhaps have thought of this already
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Old   June 8, 2010, 16:54
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Daniel
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In fact I have never used Fluent, but it is good to know that there is a similar tutorial out there. I agree, the mesh is very coarse, and this was done intentionally to more effectively show the "disturbance" in the mesh. I did try several refined meshes, but the problem did not disappear until I fixed the left-handed coordinate system.

I appreciate your reply.

Regards,
Dan
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