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Old   June 21, 2012, 18:12
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  #21
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Marco A. Turcios
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From what I remember from the spray library, it uses the cell temperature. For each parcel, we are working under the assumption that the parcel is much smaller than the cell that contains it. Because the spray parcels will exchange momentum and energy with the ambient air, the temperature will change.
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Old   June 21, 2012, 19:47
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Ok, I checked the temperature before it cracks(at time=0.00149s) and the temperature below is at 0.00144s, when the time sub-file output last time. There is no <=0 temperature in this file, they are nearly 900k, the ambient temperature:
...
899.999
899.999
899.999
899.999
899.998
899.998
899.998
899.998
899.997
899.997
899.997
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.996
899.997
899.997
899.997
899.997
899.998
899.998
899.998
899.998
899.999
899.999
899.999
899.999
900
900
900
900
900
900
900
900
)
;

boundaryField
{
walls
{
type zeroGradient;
}
}

and so is the pressure, they are nearly the ambient pressure 6e+6:

5.99976e+06
5.99977e+06
5.99977e+06
5.99977e+06
5.99977e+06
5.99977e+06
5.99977e+06
5.99977e+06
5.99977e+06
5.99978e+06
5.99978e+06
5.99978e+06
5.99978e+06
5.99978e+06
5.99978e+06
5.99978e+06
5.99978e+06
5.99977e+06
5.99977e+06
5.99977e+06
5.99977e+06
5.99977e+06
5.99977e+06
5.99977e+06
5.99977e+06
5.99976e+06
5.99976e+06
5.99976e+06
5.99976e+06
5.99976e+06
5.99976e+06
5.99976e+06
5.99976e+06
5.99976e+06
)
;

boundaryField
{
walls
{
type zeroGradient;
}
}
Could you give me some suggestions?
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Old   June 22, 2012, 12:41
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At this point it would be easiest for you to send me a copy of your case, as there could be all kinds of things going on here, possibly in sprayProperties file, themophyiscalProperties, the mesh or the spray location. Post it here if you can, or email if it is too big.
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Old   June 22, 2012, 13:21
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Quote:
Originally Posted by mturcios777 View Post
At this point it would be easiest for you to send me a copy of your case, as there could be all kinds of things going on here, possibly in sprayProperties file, themophyiscalProperties, the mesh or the spray location. Post it here if you can, or email if it is too big.
I'd like to thank your warm help at first. I have attached the files. The combustion vessel geometry is 108mm cube and spray location (0.054,0.054,0.103). The input data provided from the website:http://www.sandia.gov/ecn/cvdata/dsearch/frameset.php and http://www.cmt.upv.es/ECN01.aspx

Regards
Attached Files
File Type: zip 0.zip (7.0 KB, 2 views)
File Type: zip Properties file.zip (10.7 KB, 3 views)
File Type: zip blockMeshDict.zip (581 Bytes, 1 views)
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Old   July 11, 2012, 11:38
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Hello Marco and conceptone,
Did you guys figure out what the error is? I am facing a similar error

Kind regards,
Achinta
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Old   July 11, 2012, 12:11
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Quote:
Originally Posted by achinta View Post
Hello Marco and conceptone,
Did you guys figure out what the error is? I am facing a similar error

Kind regards,
Achinta
Sorry Achinta, I've been busy with other work and have just started looking at the problem.

conceptone, I noticed that you haven't included your chemkin folder. If you could send it that would be great.
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Old   July 20, 2012, 12:51
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Quote:
Originally Posted by mturcios777 View Post
Sorry Achinta, I've been busy with other work and have just started looking at the problem.

conceptone, I noticed that you haven't included your chemkin folder. If you could send it that would be great.
Sorry about I forgetting to include that file. I'll attach again. I guess maybe I resolve the problem, which is not caused by the input parameters.

Another problem, actually more general problem, so how can I know the meaning of output files calculated by openfoam? I mean like in sprayFoam, in the some time file, like in 0.0012/lagrangian/sprayCloud/, what's the meaning of results in mass0 file, or positions file? I mean how can I know it by doing sth.?
Thanks
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File Type: zip chemkin.zip (67.2 KB, 2 views)
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Old   July 20, 2012, 12:57
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Quote:
Originally Posted by achinta View Post
Hello Marco and conceptone,
Did you guys figure out what the error is? I am facing a similar error

Kind regards,
Achinta
Hi,actually, it's a little ... you should use the debug version to see what's wrong. If you can't build the debug version, you can post your error report and I'll check whether it's the same as mine.

You can just check the T file(temperature)in the time file which is close to the time collapse to see whether it exceeds the critical temperature of C12H26. My case is just so. If it's so, you got to modify the code of breakup model, it's finally demonstrated by this.
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