how to use Pulverized coal combustion module by using GUI.

[Yvan Fournier]

Hello,

Running under a debugger, I can see that the error occurs in cpflux.f90, line 315 due to a zero value of xdfchi = ahetch(ichcor(icla))*exp(-ehetch(ichcor(icla)*4185/(rr*propce(iel,ipctem)))
for cell 1 (iel = 1).

In turn, this is due to ehetch(ichcor(icla)) being very high (13.10e+12), so exp(-....) is close to zero.

This variable is set in your dp_FCP file, so you probably need to use a more lower value (check that your units are correct: this activation energy is in kcal/mol, so 1.3e+13 seems a bit high...)

In case you need more debugging, I recommend building a debug build of the code (see installation documentation), so you can run that version. It is slower, but the backtrace in case of error gives you the file and line number of the error, even when not running under a debugger.

Best regards,

Yvan

[nofrizal]

Hello,

Sorry that was my mistakes, but after i checked and do the correction with all the parameter units the error still as before.

For the debug build of the code, i believe that i don't have the expertise to do that because I'm just a simple user. i am actually using the default install from CAElinux 2011.
And for this case, i believe that it is just a matter of not understanding on how this case is run under code saturne.

I also noticed that when pulverized coal combustion model is turned on, i cannot set the wall temperature. So, how do i do it?

Thank you in advance.

regards,

Nofrizal

[Yvan Fournier]

Hello,

Is the error exactly the same ? You need to re-post your dp_FCP and comb1.xml files, as well as the error and/or listing files you obtain, an I can take a look, but I am not an expert in the combustion module, so I cannot guarantee you everything will work.

Best regards,

Yvan

[nofrizal]

Hello,

I think so.

here are the files as attached.

I sincerely look forward to your help.
And thank you so much.

Best regards,
Nofrizal

[nofrizal]

here the listing file

[Yvan Fournier]

Hello,

Judging by the warning message for the optical length of the semi-transparent medium, your radiative source term seems too high, or your absorption coefficient too small. Did you try increasing it ?

Best regards,

Yvan

[nofrizal]

Hello,

Yes, and I also tried to turn off radiative model but the error still the same.

I doubted with the relaxation coefficient and the hateragenous parameters(i only have data for oxygen and nothing for carbon).

Did this matter cause the error??


Best regards,

Nofrizal