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October 12, 2012, 14:04 |
geometry repair
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#1 |
Member
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 13 |
Hi! I have a problem of my geometry. I attached a picture. Have you found some holes of in this surface? Does it affect the mesh quality? How could i deal with it? Thanks!
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October 12, 2012, 15:26 |
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#3 |
Member
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 13 |
But I can't generate prim mesh. And the mesh quality is only 0.4.
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October 12, 2012, 16:24 |
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#5 |
Member
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 13 |
But when i import the mesh into fluent, the convergence curve is bad, like this picture.So I think it's the problem of the mesh. I am not sure where the problem it is.
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October 13, 2012, 00:48 |
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#7 |
Member
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 13 |
Oh, maybe. I want to analyse the pressure drop of air flow through the widest path unit (it's made of four grain kernels). So I can't change the model. I am not sure if i use the structed mesh the mesh quality will change. Because I guess the Y-GRID may be better. So do you have some idea how to use structed mesh on my model? Thank you so much!
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October 13, 2012, 18:30 |
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#9 |
Member
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 13 |
Thank you so much for your help! I will read it then think about how i can do.
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October 14, 2012, 02:52 |
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#10 |
Member
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 13 |
Hi, I used Y-grid to my geometry. But there is a problem of my mesh. I am not sure if it is the problem of block or the surface of the geometry. I think there is no problem of my block. Could you check it for me? Many thanks!
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October 14, 2012, 03:00 |
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#12 |
Member
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 13 |
thanks a lot!
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October 14, 2012, 03:20 |
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#14 |
Member
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 13 |
it is really complex. I have been confused with it for a month. I tried unstructed mesh but the the convergence is not good in fluent. So I am trying to use structed mesh now. Hope you can sovle it. And I will keep trying. Thank you so much for your help!
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October 14, 2012, 03:23 |
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#15 |
Super Moderator
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The prisms in boundary layer and tetra in the rest of the domain is good choice for this model. And convergence should be good with refined boundary layer. It is some sort of intake?
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October 14, 2012, 03:32 |
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#16 |
Member
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 13 |
Sorry, I just started learning ICEM and don't know how to use different meshes for different areas. This is a model for airflow. The inlet is at the bottom surface. And the outlet is one of the side surfaces of this model. Somebody said that the convergence is bad becuase the inlet is too close with the outlet. I am not sure. I think i can't change the model. So, just improve the mesh quality.
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October 14, 2012, 03:42 |
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#18 |
Member
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 13 |
Sorry, i really don't have an idea about your advice. I am a newcomer. I think if the structed mesh can't change the convergence, then I will try another method. So, firsly, try the structed mesh,maybe it will work.
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October 14, 2012, 03:49 |
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#20 |
Member
Rong Yue
Join Date: Oct 2012
Location: Canada
Posts: 65
Rep Power: 13 |
Thank you so much for your tutorial! You are really so nice!
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