[Mesa-users] error when accreting material similar to earth(high z)

[李宗恒]

hello mesa_users:

following is my issue

mesa-r23051

mesasdk-x86_64-linux-23.7.3.tar

when I try to make the sun-like star to accrete earth-like materials(several earth-masses),some error come out
retry: adjust_correction failed in eval_equations -- give up in solver 159
retry: get_T_tau -- L <= 0 226

the following is the composition I used
if (s% star_age >1d7 .and. s% mstar < m_limit .and. s% x_logical_ctrl(3))then
   write(,)"accreting**"
   s% accrete_same_as_surface = .false.
   s% accrete_given_mass_fractions = .true.
   s% num_accretion_species = 4
   ! s% accretion_species_id(1) = 'li7'
   ! s% accretion_species_xa(1) = 0.5
   s% accretion_species_id(1) = 'o16'
   s% accretion_species_xa(1) = 0.3
   s% accretion_species_id(2) = 'mg24'
   s% accretion_species_xa(2) = 0.2
   s% accretion_species_id(3) = 'si28'
   s% accretion_species_xa(3) = 0.2
   s% accretion_species_id(4) = 'fe56'
   s% accretion_species_xa(4) = 0.3
   s% mass_change = 1d-11
   write(,)"mstar=,m_limit=",s% mstar,m_limit
   write(,)"accreting*"

else
   write(,)"mstar=",s% mstar
   s% mass_change = 0
endif




But if I use the abundance below ,everything is fine

s% num_accretion_species = 4
      s% accretion_species_id(1) = 'h1'
      s% accretion_species_xa(1) = 0.75
      s% accretion_species_id(2) = 'he4'
      s% accretion_species_xa(2) = 0.2
      s% accretion_species_id(3) = 'li7'
      s% accretion_species_xa(3) = 1d-9
      s% accretion_species_id(4) = 'fe56'
      s% accretion_species_xa(4) = 0.04999999d0
      s% mass_change = 1d-11        




Linux LL 6.6.87.2-microsoft-standard-WSL2 #1 SMP PREEMPT_DYNAMIC Thu Jun  5 18:30:46 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux




li at LL:~$ gfortran -v

Using built-in specs.

COLLECT_GCC=/home/li/mesasdk/bin/gfortran.exec

COLLECT_LTO_WRAPPER=/home/li/mesasdk/bin/../libexec/gcc/x86_64-pc-linux-gnu/13.1.0/lto-wrapper

Target: x86_64-pc-linux-gnu

Configured with: /home/user/sdk2-tmp/build/gcc/configure CC= CXX= --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu --prefix=/home/user/sdk2-tmp/mesasdk --with-gmp=/home/user/sdk2-tmp/mesasdk --with-mpfr=/home/user/sdk2-tmp/mesasdk --with-mpc=/home/user/sdk2-tmp/mesasdk --enable-languages=c,c++,fortran --disable-multilib --disable-nls --disable-libsanitizer --enable-clocale=generic

Thread model: posix

Supported LTO compression algorithms: zlib

gcc version 13.1.0 (GCC)




Thanks a lot

Jason Lee


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