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Old   January 18, 2012, 19:19
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  #21
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Athanasios Papadopoulos
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Ι upload the pictures as you asked me (PNG files).I hope now they will be readable. I also 've done what you told me above by the problem still the same
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Old   January 18, 2012, 19:20
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Athanasios Papadopoulos
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And take a look also to this one.I hope I help you enough.If not I am steel here, as me what ever you want

Thanks again
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Old   January 18, 2012, 19:48
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Glenn Horrocks
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The image problem is that they are being shrunk somewhere.

The problem is the way you have set things up in CFX-Pre, so fix the problem there, not WB.

My last post said you used the wrong variable names. Have you fixed that?
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Old   January 19, 2012, 08:53
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Yes, I fixed that problem and the results are still the same.I thing by the way you see the geometry, you can just send me What would you do if you were in my shoes In a transient state and with one inlet (boundaryressure) and two outlet (boundaries: mass flow rate).I' ve done exactly what I need to do in the function setup according to the file that I found (how to setup a function in 1D interpolation).

The solver not even start.The graph that you see from the solver int the pictures is from a steady state and simple (one inlet "100 kPa" pressure and two outlet 0.035Kg/s each).And after that I change exactly everything and here we are now.
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Old   January 22, 2012, 07:34
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Can you post your CCL file for the current simulation?
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Old   January 22, 2012, 12:51
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I am trying to upload the file,but it doesn't accepted it.Probably because of the size.Is there any other way?

I was trying to upload the file with the simulation, because I don't know exaclty which one is the CCL file where you asked me.

Thanks
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Old   January 22, 2012, 18:49
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The CCL file is the top section of the output file. If the output file (with the startup error) is short then just upload that.
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Old   January 22, 2012, 21:23
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Look I finally found some issues to solve my problem, but now duirng the running of the solver, suddenly in the middle it stop and give me the below error:

| The fluid name is: Fluid 1. |
| If this situation persists, consider switching |
| to an Opening type boundary condition instead. |
+--------------------------------------------------------------------+
+--------------------------------------------------------------------+
| ****** Notice ****** |
| A wall has been placed at portion(s) of an OUTLET |
| boundary condition (at 2.9% of the faces, 0.9% of the area) |
| to prevent fluid from flowing into the domain. |
| The boundary condition name is: outlet. |
| The fluid name is: Fluid 1. |
| If this situation persists, consider switching |
| to an Opening type boundary condition instead. |
+--------------------------------------------------------------------+
+--------------------------------------------------------------------+
| ****** Notice ****** |
| A wall has been placed at portion(s) of an OUTLET |
| boundary condition (at 1.6% of the faces, 0.6% of the area) |
| to prevent fluid from flowing into the domain. |
| The boundary condition name is: outlet2. |
| The fluid name is: Fluid 1. |
| If this situation persists, consider switching |
| to an Opening type boundary condition instead. |
+--------------------------------------------------------------------+
| H-Energy | 0.32 | 5.7E-03 | 2.5E-01 | 5.8 1.2E-03 OK|
+----------------------+------+---------+---------+------------------+

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Floating point exception: Overflow |
| |
| |
| |
| |
| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| Writing crash recovery file |
+--------------------------------------------------------------------+

Details of error:-
----------------
Error detected by routine POPDIR
CRESLT = ILEG




Any idea?

Thanks
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Old   January 23, 2012, 06:41
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Can you please post your entire output file?

The error is a typical one - floating point error means you simulation has diverged. You need to improve the numerical stability. Use smaller time steps, a better initial condition, lower order differencing (but switch to higher order for accuracy later), double precision numerics, check your physics in correct, improve mesh quality.... the list goes on....
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Old   January 23, 2012, 17:38
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I am trying to upload the file, but it doesn't me,probably because of the size.Can you gine you email (if it's possible), so I will upload the hall file and you can take from there.Because I can't see any other way. Maybe you know
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Old   February 1, 2012, 18:27
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I upload a foto with the content of the CFX file that is created by the software. Check which file you need exaclty so I can sended to you.

Thanks!
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