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February 23, 2012, 01:16 |
Multizone Meshing
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#1 |
Senior Member
Ali
Join Date: Jan 2012
Location: Pakistan
Posts: 134
Rep Power: 16 |
Dear:
I have made a multi-zone mesh in ICEM around a cylindrical body with a blunt nose. I want a butterfly mesh at the surface of the far-field region (front and back) as shown in figure 5 and 6. 5.jpg 6.jpg Initially, I made a mesh as shown in figures 1a, 2a, and the cut plane at Z=0 in figure 3a. 1a.jpg 2a.jpg 3a.jpg |
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February 23, 2012, 01:19 |
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#2 |
Senior Member
Ali
Join Date: Jan 2012
Location: Pakistan
Posts: 134
Rep Power: 16 |
Continuity of previous thread:
To make the butterfly mesh at the base of far-field I split O-block at that face, that deteriorate my mesh (see figures 1, 2 and 3). 1.jpg 2.jpg 3.jpg Tell me how can I make the butterfly mesh on the body nose and base and similarly on the far-filed downstream and upstream region, as I showed in figures 5 and 6 (in first post). 6.jpg I also need to have a wake behind the body like in figure 4. 4.jpg |
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February 25, 2012, 02:56 |
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#3 |
Senior Member
Ali
Join Date: Jan 2012
Location: Pakistan
Posts: 134
Rep Power: 16 |
Any one can help me?
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February 25, 2012, 16:47 |
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#4 |
Senior Member
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
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Sure, but not with MultiZone...
Perhaps you should start with regular hexa blocking as the first step... Initialize blocking, then split for the semi-circular portion of the far field and then use split blocks => Ogrid... Select the blocks and select the one face at the outlet of the FF. Apply... THis will give you your nice outer mesh... You can keep splitting to get a fully hexa model or you could convert the inner block to "free" and proceed with Multizone...
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February 25, 2012, 16:48 |
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#5 |
Senior Member
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
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I should say that if you want to start with Multizone, it may be best to subdivide your surfaces as you like before initializing the 2D blocking...
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February 25, 2012, 23:32 |
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#6 |
Super Moderator
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February 26, 2012, 20:35 |
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#7 |
Senior Member
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,663
Blog Entries: 1
Rep Power: 47 |
Multizone starts with an operation to extract surface blocking from the surfaces... Surfaces with 4 corners (not necessarily 4 sides) get mapped. Surfaces with 3 corners get mapped with a quarter Ogrid... Other numbers of corners may get a free face.
Since his Far field has a round outlet, it gets a free surface. If he wants it some other way, he could "draw" curves on it and then build topo so the drawn lines will segment the surface. Then the surface blocking will give that configuration... Its not what I would do (I would do top down), but it would work...
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----------------------------------------- Please help guide development at ANSYS by filling in these surveys Public ANSYS ICEM CFD Users Survey This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)... CFD Online Users Survey |
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