Pulverized Coal Combustion Problems

[Design_BIB]

Hi, Good morning from Thailand

I'm a newbie user of code-saturne around 1 year simulation experience. But I always keep contact with this forums when i had a problems. So First let me THANK to Admin and every user for many kind of knowledges. Thanks again!!!

Now I think it's time to bother you again. I have a task to simulate COMBUSTION study in this manner with Pulverized Coal Combustion Idle (Without particles, Only Eulerian simulation). I had input a necessary data such a composition of coal (biomass), Oxydant and other values. ...... But they are always notice this statement



===============================================================

CALCULATION PREPARATION
=======================


===========================================================



@
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@
@ @@ ATTENTION : ARRET A L'ENTREE DES DONNEES (CPLECD)
@ =========
@ PHYSIQUE PARTICULIERE (CHARBON PULVERISE)
@
@ MATRICE NON INVERSIBLE POUR LE CALCUL DES
@ MATIERES VOLATILES
@ pour le charbon 1
@
@ Verifier le fichier parametrique.
@
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@


Call stack:
1: 0x7fb6f96e0483 <cs_coal_readata_+0x2516> (libsaturne.so.0)
2: 0x7fb6f9532c5e <pplecd_+0x37a> (libsaturne.so.0)
3: 0x7fb6f947ea87 <varpos_+0x1eb> (libsaturne.so.0)
4: 0x7fb6f940a3c9 <iniusi_+0x279> (libsaturne.so.0)
5: 0x7fb6f9409dc9 <initi1_+0x4d> (libsaturne.so.0)
6: 0x7fb6f9328dcf <cs_run+0x6df> (libsaturne.so.0)
7: 0x7fb6f932860a <main+0x14a> (libsaturne.so.0)
8: 0x7fb6f8d1d76d <__libc_start_main+0xed> (libc.so.6)
9: 0x4006c9 <> (cs_solver)
End of stack



So I don't know how to solve it because i had revised all value many many time and it's still notice in this manner.
Could you please revise my configuration and suggest me to solve it ?!!

P.S. I used Code_Saturne with GUI Version 3.0.0


Thanks in advance,
Chayawat

[Yvan Fournier]

Hello,

I'm not a specialist of the coal combustion parts of the code, so I can't give you a quick answer, but I'll try to take a look, or check wth the specialists. I recall someone having a similar problem some months ago, but don't remember how it was solved (or whether it was on this forum; i'll let you check if you have'nt done so already) In any case, it's always safer to use the latest 3.0 release (3.0.3) in case a bug fix might be related to your problem.

But you may need to wait a few days for a good answer.

Best regards,

Yvan

[Design_BIB]

Hello Yvan,

Thank you in your reply. Nowadays, I still cannot solve this problem.
So I will waiting your solution and I will solve by myself too.

Thanks again,
Chayawat

[Yvan Fournier]

Hello,

Running under a debugger, I obtain a slightly different problem using version 3.0 or "trunk" (next 3.3), but in both cases, it seems related to the user definition of stoichiometric coefficients:

Does your data setup work with non-user stoichiometric coefficients ?

In version 3.0 and 3.1, it seems the code will lead to the error no matter what you do, while in 3.2, things crash a bit later, complaining about a negative chx1 or chx2 (chx1 being the negative value). I suspect the difference might be due to bug fixes in the GUI reader, but am not sure. So in more recent versions, changing your stoichiometric might work...

I'm not sure we'll have the time to fix this before we release 3.3.0 and 3.0.4 (respectively containing quite a few new functionalities and bug fixes we want to make available without delay), but we can continue looking into this so as to provide you with a patch, and then make things available in the following bug-fix releases.

Regards,

Yvan

[Design_BIB]

Hi, Yvan


Thanks for your reply again. In my case, I just input a composition of coal (biomass) particles and air molar ratio only. I had only those parameters (which related to combustion reaction) and I don't know the certain stoichiometric coefficients in this manner.

So I will follow your suggestion by revise my data and use CS Version 3.2.2. to solve it basicly.

Thank you again

Best Regards,

Chayawat T.

[Design_BIB]

Hi Yvan,

I'm stuck with chx1 / chx2, as you expected before.

So can you tell me s simple issue, What is chx1 or chx2 and which parameter in GUI affect to them ??


Best Regards,
Chayawat T.

[Design_BIB]

Hi,

Can anyone help me. I'm still waiting for you.


Best Regard,
Chayawat