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Old   September 19, 2012, 04:48
Question Question about I-grid
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Meimei Wang
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Hi,

Could you please show me a picture of I-grid?
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Old   September 19, 2012, 09:47
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Attached you have a picture of an I type mesh. Regards
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File Type: jpg I type mesh.JPG (59.0 KB, 19 views)
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Old   September 20, 2012, 02:43
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Quote:
Originally Posted by gfoam View Post
Attached you have a picture of an I type mesh. Regards
Gonzalo
Why we need to use the I-block for the blades for that case?
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Old   September 20, 2012, 07:35
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I thinkyou must use it because you can get a mesh with high quality in that geometry. An the clls generates have faces which are almost normal to the local flux, so that you can get a converged solution easier and faster. Moreover whith hexahedral or cuadrilateral cells you can get a mesh with high resolution with fewer cells than a mesh with triangles or tetrahedrons. Regards.
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Old   September 20, 2012, 09:36
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Quote:
Originally Posted by gfoam View Post
I thinkyou must use it because you can get a mesh with high quality in that geometry. An the clls generates have faces which are almost normal to the local flux, so that you can get a converged solution easier and faster. Moreover whith hexahedral or cuadrilateral cells you can get a mesh with high resolution with fewer cells than a mesh with triangles or tetrahedrons. Regards.
Gonzalo
Thanks for your answer.

But one drawback of that I-block is the non-uniform mesh at each side of your blade. When your inlet angle is even larger, that drawback will be more critical. How to solve that problem in this case?
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Last edited by Anna Tian; September 20, 2012 at 09:58.
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Old   September 20, 2012, 10:11
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Hi:
well, you use I-type and other grids like that when you have periodic BC's at the top and bottom face, but if you have high AoA flow at the inlet, i don't know if th condtion of periodicity is still satisfied. So in that cases you must simulate the entire domain and not only a part of this. But I don't have much experience with turbomachinery simulations and therefore I'm not sure about it. Regards.
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