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October 27, 2014, 02:17 |
Geometry by blockMesh
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#1 |
Senior Member
Mominul MuKuT
Join Date: Mar 2009
Location: Bangladesh
Posts: 124
Rep Power: 17 |
Experimentally I have investigated the effect of a special type of VG on flow separation in a diffuser of a wind tunnel. Wind tunnel geometry is as like attached image:
Using blockMesh, I have made the flow domain of wind tunnel including the diffuser section which is as below: But I don't understand how can I make the VG geometry over the bottom plate of wind tunnel upstream of diffuser [see first image]. Is it possible to make VG geometry by blockMesh? or any other software necessary in this regard? Thanks in advance. |
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October 28, 2014, 05:00 |
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#2 |
Senior Member
Mominul MuKuT
Join Date: Mar 2009
Location: Bangladesh
Posts: 124
Rep Power: 17 |
Hello! Any suggestion? I am waiting for your kind suggestion/advice regarding this.....
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October 28, 2014, 06:12 |
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#3 |
Senior Member
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Hi,
I do not understand your problem, maybe one of the GUI will support you with more complex Blockmesh geometries, have a look at SwiftBlock http://openfoamwiki.net/index.php/Contrib/SwiftBlock http://www.cfd-online.com/Forums/ope...s-meshers.html |
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October 28, 2014, 06:27 |
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#4 |
Senior Member
Mominul MuKuT
Join Date: Mar 2009
Location: Bangladesh
Posts: 124
Rep Power: 17 |
Dear elvis,
Thanks for reply. Using blockMesh, I have made the domain as shown below: Now I would like to introduce VG inside this flow domain like as shown below: How can I do this? Thanks |
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October 29, 2014, 06:38 |
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#5 |
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Julian Langowski
Join Date: May 2011
Location: Bremen, Germany
Posts: 91
Rep Power: 15 |
Hi Mominul,
if the VGs have a very "straight-forward" geometry, you could use blockMesh. You just have to figure out a way, how to lay the blocks around the VGs. Anyhow, using snappyHexMesh might be a lot easier. Best regards Julian
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πάντα ῥεῖ - Heraclitus |
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October 29, 2014, 06:48 |
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#6 |
Senior Member
Mominul MuKuT
Join Date: Mar 2009
Location: Bangladesh
Posts: 124
Rep Power: 17 |
Dear Ruli,
Actually the VG is a rectangular vane VG which is placed 25 deg with flow direction. So, it is possible to make such vg having 25 deg angle with x direction by blockMesh? And before using snappyHexMesh, may be it is necessary to make stl of such VG, right? Thanks |
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October 29, 2014, 06:59 |
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#7 | ||
Member
Julian Langowski
Join Date: May 2011
Location: Bremen, Germany
Posts: 91
Rep Power: 15 |
Dear Mukut,
Quote:
You have to keep in mind: in blockMesh you have to manually define all the blocks, which your mesh consists off (as you did with the basic wind tunnel shape). Thus, if the VGs have a simple rectangular shape, it might be possible with blockMesh, although it is tideous work... Quote:
Best regards Julian
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October 29, 2014, 07:22 |
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#8 |
Senior Member
Mominul MuKuT
Join Date: Mar 2009
Location: Bangladesh
Posts: 124
Rep Power: 17 |
Here is the closer look of 3 VG arrangement upstream of diffuser.
VG length is 28mm, height 7mm, thickness 1mm |
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October 29, 2014, 07:45 |
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#9 |
Senior Member
Mominul MuKuT
Join Date: Mar 2009
Location: Bangladesh
Posts: 124
Rep Power: 17 |
Dear Ruli,
Would you please share your idea about how to make VG with blockmesh? This VG is not parallel with x direction. I am waiting to know your idea. Thanks again |
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