[jasonbot]

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]

You can do better mesh by:

1. Use orgrid around trailing edge

2. Edge mesh parameters.

[jasonbot]

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]

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]

Originally Posted by Far

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]

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

[koucfd]

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]

Originally Posted by koucfd

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.

[luzikato]

Hey, I just started learning ICEM CFD and I wonder if you can kindly explain the way you used the o-grid around the trailing edge?




Best regards