Natural convection through a hole in a vertical wall
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Re: Natural convection through a hole in a vertical wall
That looks very close, not sure you could get any better. If Boundary 2 does act as a hole, and it might if you don't assign any conditions to it, you could delete the boundary 2 elements from the boundary file and modify the header. BC 1 includes the interior wall but that may be OK depending on the assigned conditions.
Re: Natural convection through a hole in a vertical wall
Kevin,
I still don't know how to write the Boundary Definitions section. Can you be kind to help me with that?
Best,
F.
I still don't know how to write the Boundary Definitions section. Can you be kind to help me with that?
Best,
F.
Re: Natural convection through a hole in a vertical wall
I think this should be the correct way to define the boundries:
Checked in ElmerGUI and seems to be OK.
Now moving to the .sif file.
Code: Select all
Boundary Definitions
! type out int double of the boundaries
1 0 1 1
2 0 2 1
3 3 1 1
4 4 2 1
End
Now moving to the .sif file.
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- HoleNatConv.grd
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Last edited by foadsf on 02 Dec 2021, 13:29, edited 1 time in total.
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Re: Natural convection through a hole in a vertical wall
Mesh looks good
Re: Natural convection through a hole in a vertical wall
the first attempt for the .sif file isn't that promising. Basically, everything is static. There is no convection!
Temperature distribution
Temperature distribution
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- HoleNatConv.sif
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Last edited by foadsf on 02 Dec 2021, 13:29, edited 1 time in total.
Re: Natural convection through a hole in a vertical wall
Looking at Natural convection test examples, I see that I didn't have a Body Force:
I also added some other Material Properties:
which I copied from here. Now I get the infamous error message:
Code: Select all
Body Force 1
Name = "Bouancy"
Boussinesq = True
End
Code: Select all
Material 1
! .....
Reference Temperature = 300
Heat expansion Coefficient = 3.43e-3
! .....
End
...
350 0.4310E+01
351 0.4310E+01
ERROR:: IterSolve: Numerical Error: Too many iterations were needed.
STOP 1
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- HoleNatConv.sif
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Last edited by foadsf on 02 Dec 2021, 13:29, edited 1 time in total.
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Re: Natural convection through a hole in a vertical wall
If I run it with air and the middle boundary at 303 I get a temp distribution
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Re: Natural convection through a hole in a vertical wall
If I take the temperature boundary off the middle I get this
Re: Natural convection through a hole in a vertical wall
Kevin,
there must be a flow due to gravity/buoyancy leading to free convection. Is your case, also there is none.
there must be a flow due to gravity/buoyancy leading to free convection. Is your case, also there is none.
Last edited by foadsf on 02 Dec 2021, 13:28, edited 1 time in total.
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Re: Natural convection through a hole in a vertical wall
Sorry I did not have stokes turned on just the heat