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-   -   [ICEM] Help in meshing a 2D Nozzle????? (http://www.cfd-online.com/Forums/ansys-meshing/70060-help-meshing-2d-nozzle.html)

harman79 November 13, 2009 07:15

Help in meshing a 2D Nozzle?????
 
1 Attachment(s)
Hi guys,

I am new in meshing-CFD so here is an easy one for you I guess.. I am trying to mesh a 2D nozzle in ICEM. If anyone is bothered to have a look, I have attached an image of the sequence of steps I followed, together with the final "mesh"..

http://rapidshare.com/files/30637856...Steps.jpg.html

The end result as you can see does not resemble a mesh at all (just a series of lines across nozzle)...

Basically, after creating a bounding box I tried splitting the edges so that I can approximate the actual nozzle geometry before applying the mesh parameters using the curve mesh setup tool.. Using a very similar approach I managed to successfully mesh the same nozzle in 3d at ICEM.. Yet the 2d version seems to be more challenging for me.... :confused:

I did search this forum for similar threads but did not really find anything of real help...

Any help would be much appreciated,
Thanks in advance!

PSYMN November 15, 2009 17:37

Edge params...
 
You have not set any mesh sizes. Those "lines across the nozzle" are just long skinny elements. You can adjust the number of elements (the distribution) vertically to have more than one element from top to bottom and to give nice near wall spacing, growth ratio, etc...

Even trying one single Hexa tutorial would show you this critical step (or at least look up "Edge parameters" in the help). The tutorials can be found under "help" in the GUI.

Simon

harman79 November 16, 2009 03:44

Simon,

thanks for the quick reply.. Sorted. I though that just setting up the curve meshing parameters for the actual nozzle geometry would be enough. I did not realise that I had to repeat for the blocking.

Thanks for getting me unstuck,
Harry

PSYMN November 16, 2009 09:03

Update
 
The first option under premesh params will update the blocking edge params based on the geometry params...

Simon

Alberto1987 November 22, 2009 23:45

I recommend you to use Axisymetric solver, the mesh would be smaller and you will solve it faster


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