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[ICEM] Blunt Trailing Edge Mesh

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Old   September 16, 2013, 08:06
Default Blunt Trailing Edge Mesh
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Jason
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Hi,

Is there any good literature on meshing strategies for blunt trailing edge airfoils? I have only recently become involved with CFD and after my first Fluent run I am not convinced that my current trailing edge mesh is doing a good job of resolving the flow conditions correctly.

I have attached a picture of my mesh at the TE as made in ICEM.
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Old   September 16, 2013, 08:31
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You can do better mesh by:

1. Use orgrid around trailing edge

2. Edge mesh parameters.
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Old   September 16, 2013, 13:54
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Ah! I get much better results with the O-grid.

Attached is my new mesh and results at the TE. I could be wrong but that recirculation looks good.
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File Type: jpg recirc.jpg (34.8 KB, 96 views)
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Old   September 16, 2013, 14:02
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In the wake region you can make more dense mesh. Do these steps

1. Match mesh between two blocks i.e. o grid and the downstream mesh in wake region by match edge mesh

2. Split wake block at one chord length downstream and pack more nodes there. Step 1 should be repeated if you see the large jumps there. Or do the step 1 after step two. Moreover the mesh in two blocks (after split) in wake region should also be smooth. Again use match edge mesh parameters command.
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Old   September 16, 2013, 14:32
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Quote:
Originally Posted by Far View Post
In the wake region you can make more dense mesh. Do these steps

1. Match mesh between two blocks i.e. o grid and the downstream mesh in wake region by match edge mesh

2. Split wake block at one chord length downstream and pack more nodes there. Step 1 should be repeated if you see the large jumps there. Or do the step 1 after step two. Moreover the mesh in two blocks (after split) in wake region should also be smooth. Again use match edge mesh parameters command.
Do you mean large jumps in cell size?
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Old   September 16, 2013, 15:00
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Yes. I wanted to say you should not have the large jumps in cell size
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Old   February 18, 2015, 10:56
Default Meshing tutorial of blunt trailing edge airfoil
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Hey,
I just started with my project on flow analysis over a blunt trailing edge. The meshing is been done using ICEM CFD and is solved in ANSYS CFX. I have no prior experience with either of them. Kindly suggest/share if you know any tutorials for meshing of blunt trailing edge airfoil and cfx solver for similar kind of problem.

Thanks in advance !
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Old   February 18, 2015, 12:54
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Quote:
Originally Posted by koucfd View Post
Hey,
I just started with my project on flow analysis over a blunt trailing edge. The meshing is been done using ICEM CFD and is solved in ANSYS CFX. I have no prior experience with either of them. Kindly suggest/share if you know any tutorials for meshing of blunt trailing edge airfoil and cfx solver for similar kind of problem.

Thanks in advance !
This is your best best: https://www.youtube.com/watch?v=tYrbScUH9RE

Otherwise the ansys tutorials available on the customer portal should have airfoil tutorials for CFX (I use Fluent). Remember to go back to fundamentals always.
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