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April 28, 2011, 08:28 |
Aerodynamic simulation
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#1 |
New Member
Michele
Join Date: Apr 2011
Posts: 17
Rep Power: 15 |
Hi everybody,
I have to make an aerodynamic simulation, how can I build a control volume (such as a wind tunnel)after importing the geometry I have to simulate? then, once I have made this system (body + wind tunnel) which is the best way to operate: give solid properties to body and fluid to control volume, or make a boolean operation to subtract body from control volume and give fluid properties to the resulting volume? thank you! |
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April 28, 2011, 08:39 |
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#2 | |
Senior Member
Ryne Whitehill
Join Date: Aug 2009
Posts: 312
Rep Power: 18 |
Quote:
Import the geometry as a part, create a box part to the size you want, then do a boolean subtract with the box part as the "target part" |
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April 28, 2011, 10:32 |
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#3 |
New Member
Michele
Join Date: Apr 2011
Posts: 17
Rep Power: 15 |
very kind of you, many thanks
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April 29, 2011, 05:30 |
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#4 |
New Member
Michele
Join Date: Apr 2011
Posts: 17
Rep Power: 15 |
I tried the way you suggested, I subtracted a sphere from a tunnel (in STAR DESIGN), it works correctly.
I tried onother way, too: import two separate bodies in STAR CCM, but i have a problem to asign properties to singular bodies (such as physical properties, mesh sizing etc..): when I am importing geometries, which is the best way to import: create a new region or a new part? Have you ever made something similar? I really thank everyone of you is interested in giving me an answer |
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April 29, 2011, 09:52 |
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#5 | |
Senior Member
Ryne Whitehill
Join Date: Aug 2009
Posts: 312
Rep Power: 18 |
Quote:
I prefer to import as a part. You then need to create an empty region with boundaries and assign the surfaces of the part to the region boundaries. Then do Mesh->Initialize Meshing, which transfers the geometric data from the Part level to the Region level. It is a good habit to import as a part as I have heard that eventually CD-Adapco is going to do away with the import as region. |
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April 30, 2011, 11:03 |
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#6 |
New Member
Michele
Join Date: Apr 2011
Posts: 17
Rep Power: 15 |
Thank you Ryne!
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May 1, 2011, 07:32 |
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#7 | |
Senior Member
Join Date: Oct 2009
Location: Germany
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Quote:
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May 2, 2011, 06:25 |
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#8 |
New Member
Michele
Join Date: Apr 2011
Posts: 17
Rep Power: 15 |
Thanks for your suggestion Abdul...I tried this way too I have to define 2 mesh and 2 physic cases to define properties for 2 parts, isn't it?
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May 2, 2011, 08:17 |
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#9 | |
Senior Member
Ryne Whitehill
Join Date: Aug 2009
Posts: 312
Rep Power: 18 |
Quote:
Yes, thank you for correcting me, this is how I typically do it. Much easier than doing it by hand. |
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May 3, 2011, 03:34 |
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#10 | |
Senior Member
Join Date: Oct 2009
Location: Germany
Posts: 636
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Quote:
And for the mesh continuum, you usually use only one as well as long as you don't want to give completely different values or models to different regions. Will you have two regions? When doing so, is it necessary to have two regions? |
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May 3, 2011, 07:58 |
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#11 | |
New Member
Michele
Join Date: Apr 2011
Posts: 17
Rep Power: 15 |
Quote:
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May 3, 2011, 08:30 |
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#12 |
Senior Member
Ryne Whitehill
Join Date: Aug 2009
Posts: 312
Rep Power: 18 |
If you are only interseted in the air flow, then you do not need a continuum for the solid part. You will only need the 2nd continuum if you are intersted in something like the heat transfer through the solid.
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May 3, 2011, 09:48 |
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#13 |
New Member
Michele
Join Date: Apr 2011
Posts: 17
Rep Power: 15 |
Ok..however I have to mesh both the "solid" region and the fluid region, isn't it?
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May 3, 2011, 10:51 |
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#14 | |
Senior Member
Ryne Whitehill
Join Date: Aug 2009
Posts: 312
Rep Power: 18 |
Quote:
The volume mesh of the flow field will use the surface boundaries of the solid body. |
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May 5, 2011, 02:21 |
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#15 |
New Member
Michele
Join Date: Apr 2011
Posts: 17
Rep Power: 15 |
thank you Ryne, I will check the simulation using one volume mesh
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