TAGGED: CESE, chemistry, combustion
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October 18, 2024 at 5:42 am
3171539872
Subscriberbackground
I built a two-dimensional combustion model of aluminum, using a rectangle with a length of 0.5m and a width of 0.04, and a mesh size of 0.004
KEYWORD
*KEYWORD*CONTROL_TERMINATION$# endtim endcyc dtmin endeng endmas nosol0.001 900000 0.0 0.01.000000E8 0*DATABASE_BINARY_D3DUMP$# dt lcdt beam npltc psetid cid nskip10000.0 0 0 0 0 0 0*DATABASE_BINARY_D3PLOT$# dt lcdt beam npltc psetid1.00000E-5 0 0 0 0*CESE_CONTROL_SOLVER$# icese iflow igeom iframe0 1 2 0*CESE_CONTROL_TIMESTEP$# iddt cfl dtint1 0.55.00000E-9*CESE_CONTROL_LIMITER$# idlmt alfa beta epsr0 10.0 0.5 0.1*CESE_INITIAL_CHEMISTRY$# chemid compid5 12$# uic vic wic rhoic pic tic hic0.0 0.0 0.0 0.0 104000.0 300.0 0.0*CESE_INITIAL_CHEMISTRY_SET$# setid chemid compid1 5 11$# uic vic wic rhoic pic tic hic0.0 0.0 0.0 0.0 1000000 1000.0 0.0*CESE_PART$# pid mid eosid1 1 1*CESE_EOS_IDEAL_GAS$# eosid cv cp1 10.0 10.0*CESE_MAT_GAS$# mid c1 c2 pr1 1.0 1.0 1.0*INCLUDEtrugrdo.k*CHEMISTRY_CONTROL_FULL$# id errlim rhomin tmin5 0.0 0.0 0.0*CHEMISTRY_COMPOSITION$# id modelid11 10$# molfr species100000.0AL*CHEMISTRY_COMPOSITION$# id modelid12 10$# molfr species1.0O2*CHEMISTRY_MODEL$# modelid jacsel errlim10 1 0.001$#reaction.inp$#therm.dat$#*ENDERROR
Nonlinear chemistry EOS temperature solver returned a negative value.
-0.19805E+04
*** Error 150210 (CHEM+210) (processor # 3)
Nonlinear chemistry EOS temperature solver returned a negative value.
-0.40183E+03
CHEM_COMBUST_T: Failed to converge
In the calculation of the burning model of co if there is this error I only need to put the net style is small to solve, this error even if I put the net style is small to 0.001, it can not be solved, want to ask how to solve this problem -
October 23, 2024 at 4:11 am
mohan.urs
Ansys EmployeeHi,
Ansys employees cannot answer this query. Please wait for other forum members to chime in.
Regards,
Mohan Urs
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October 30, 2024 at 11:22 am
Atish Gawale
SubscriberSomething seems to be nonphysical in your model. Hence you are getting this error. You also need good structured mesh for combustion using CESE + CHEMISTRY solver
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