TAGGED: CESE, chemistry, combustion
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October 18, 2024 at 5:42 am3171539872Subscriber
background
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$# endtim  endcyc   dtmin  endeng  endmas   nosol   0.001  900000    0.0    0.01.000000E8     0*DATABASE_BINARY_D3DUMP$#   dt   lcdt   beam   npltc  psetid    cid   nskip  10000.0     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  iframe     0     1     2     0*CESE_CONTROL_TIMESTEP$#  iddt    cfl   dtint     1    0.55.00000E-9*CESE_CONTROL_LIMITER$#  idlmt   alfa   beta    epsr     0   10.0    0.5    0.1*CESE_INITIAL_CHEMISTRY$# chemid  compid     5    12$#   uic    vic    wic   rhoic    pic    tic    hic    0.0    0.0    0.0    0.0 104000.0   300.0    0.0*CESE_INITIAL_CHEMISTRY_SET$#  setid  chemid  compid     1     5    11$#   uic    vic    wic   rhoic    pic    tic    hic    0.0    0.0    0.0    0.0  1000000  1000.0    0.0*CESE_PART$#   pid    mid   eosid     1     1     1*CESE_EOS_IDEAL_GAS$#  eosid    cv    cp     1   10.0   10.0*CESE_MAT_GAS$#   mid    c1    c2    pr     1    1.0    1.0    1.0*INCLUDEtrugrdo.k*CHEMISTRY_CONTROL_FULL$#   id  errlim  rhomin   tmin     5    0.0    0.0    0.0*CHEMISTRY_COMPOSITION$#   id  modelid    11    10$#  molfr                                species 100000.0AL*CHEMISTRY_COMPOSITION$#   id  modelid    12    10$#  molfr                                species    1.0O2*CHEMISTRY_MODEL$# modelid  jacsel  errlim    10     1   0.001$#                                       Âreaction.inp$#                                       Âtherm.dat$#                                       ÂÂ*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 ammohan.ursAnsys Employee
Hi,
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 amAtish GawaleSubscriber
Something 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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