CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   ANSYS Meshing & Geometry (http://www.cfd-online.com/Forums/ansys-meshing/)
-   -   [ICEM] Blunt Trailing Edge Mesh (http://www.cfd-online.com/Forums/ansys-meshing/123562-blunt-trailing-edge-mesh.html)

jasonbot September 16, 2013 08:06

Blunt Trailing Edge Mesh
 
1 Attachment(s)
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.

Far September 16, 2013 08:31

You can do better mesh by:

1. Use orgrid around trailing edge

2. Edge mesh parameters.

jasonbot September 16, 2013 13:54

2 Attachment(s)
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.

Far September 16, 2013 14:02

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.

jasonbot September 16, 2013 14:32

Quote:

Originally Posted by Far (Post 452072)
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?

Far September 16, 2013 15:00

Yes. I wanted to say you should not have the large jumps in cell size :)

koucfd February 18, 2015 10:56

Meshing tutorial of blunt trailing edge airfoil
 
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 !

jasonbot February 18, 2015 12:54

Quote:

Originally Posted by koucfd (Post 532340)
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.


All times are GMT -4. The time now is 01:19.