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wadoud31 November 12, 2010 07:15

hexa meshing prob
i am new to this forum and I need help, I have a problem with hexa meshing

johnp November 12, 2010 12:36

Welcome. You will need to provide more details of your specific problem in order to get any meaningful responses.

PSYMN November 14, 2010 22:22


wadoud31 November 17, 2010 09:21

1 Attachment(s)
Thank you I want to study the flow in a channel cross dawn, but I have problems meshing (hexa) here is the geometry

johnp November 17, 2010 10:11

The geometry doesn't look too difficult to me. There is an excellent tutorial on youtube that will get you started. It's in three parts, here's the link to the first:

PSYMN November 17, 2010 12:01

more specifically...
For success with this sort of model, you should pay close attention to the options for "shifted periodic" if you are modeling the tip gap. However, if you are not modeling the tip gap (2D certainly does not include the tip gap), try modeling the channel instead of around the blade (to avoid much of the periodicity).

You can find info about that in part 1 of the you-tube mini-series or by searching those terms in CFD-Online.

Best regards,


wadoud31 November 18, 2010 08:16

thank you for your kindness, I saw the video but I could not do better now, the mesh quality is very poor, so I can send you the geometry and try to make the mesh, I'd be very grateful

PSYMN November 18, 2010 11:37

I am already a little overcommitted right now. Maybe someone else can help.

Note, you still haven't even said what your problem with Hexa is...

wadoud31 November 18, 2010 13:15

my problem that I can not get a good mesh with refinement on the walls like this example, thank you my friend

johnp November 18, 2010 13:53

Can you post an image of the blocking strategy you are trying? This will make the problem easier to diagnose.

wadoud31 November 18, 2010 14:06

thank you for your interest in my problem, I want a mesh like this examle (aube)

wadoud31 November 18, 2010 14:47

1 Attachment(s)
like this example

wadoud31 November 18, 2010 14:48

1 Attachment(s)
this my blocking

PSYMN November 18, 2010 15:00

How about a picture that shows the problem?

wadoud31 November 18, 2010 15:07

1 Attachment(s)
htis is the picture

wadoud31 November 19, 2010 15:48

hello everyone, I'm still waiting assistance, thank you.

PSYMN November 19, 2010 17:54

What is the problem?
You need to generate an Ogrid.

GO to split blocks => OGrid and select all the blocks.

Then Select all the outer edges so Ogrid won't form there.

THen Apply.

The Ogrid will form around the remaining edges that you did not select (the edges around your airfoil.)

I guess I can help with this simple thing if you post the files. (*.prj, *.tin and *.blk)

wadoud31 November 20, 2010 05:05

thank you simon for your advice, I try to do that but I can not,how i can send the requested file, my email:

wadoud31 November 23, 2010 12:58

transonic flow: experimental data of (MUR 45 of VKI CT2)
hello everybody, I need experimental data to test MUR 45 of the geometry VKI CT2 and also the conditions of the flow (transonic flow), thank you

wadoud31 December 1, 2010 11:16


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