[FLASH-USERS] error issue with laser slab

[赵旭]

Hi Antoine,

For the error of 'too many iterations, reached 50 ', you can try two things which just work for me :

1) change the run parameter eos_maxNewton to a larger value, for example ,1e7 
2) set the run parameter irenorm = 1

I dont know really know what these run parameters mean, but they work for this error.

And I also want to know why this error happens in laserslab simulation. I hope someone else can explain more.

I guess the problem may come from the EOS/Opcity setting, would you please update more some details about your simultion like .par / setup /Config file ?

Best 

Zhao Xu
Laboratory for Laser Plasmas (MoE)
Shanghai Jiao Tong University

----- 原始邮件 -----
发件人: "Antoine Gintrand" <antoine.gintrand at gmail.com>
收件人: "flash-users" <flash-users at flash.rochester.edu>
发送时间: 星期二, 2022年 6 月 07日 下午 10:31:22
主题: [FLASH-USERS] error issue with laser slab

Dear users, 

I am experiencing an issue in a laser slab simulation and I am having this error. 

n t dt ( x, y, z) | dt_hydro dt_Diff dt_HeatXc CFL 
6940 6.9016E-10 1.0000E-13 ( 2.500E-04, 4.890E-02, 0.00 ) | 1.242E-13 6.557E+84 9.505E+85 0.1000000 
6941 6.9026E-10 1.0000E-13 ( 2.500E-04, 4.890E-02, 0.00 ) | 1.242E-13 6.557E+84 9.702E+85 0.1000000 
6942 6.9036E-10 1.0000E-13 ( 2.500E-04, 4.890E-02, 0.00 ) | 1.242E-13 6.557E+84 9.436E+85 0.1000000 
6943 6.9046E-10 1.0000E-13 ( 2.500E-04, 4.890E-02, 0.00 ) | 1.242E-13 6.556E+84 9.419E+85 0.1000000 
6944 6.9056E-10 1.0000E-13 ( 2.500E-04, 4.890E-02, 0.00 ) | 1.242E-13 6.556E+84 9.560E+85 0.1000000 
6945 6.9066E-10 1.0000E-13 ( 2.500E-04, 4.890E-02, 0.00 ) | 1.242E-13 6.556E+84 9.603E+85 0.1000000 
6946 6.9076E-10 1.0000E-13 ( 2.500E-04, 4.890E-02, 0.00 ) | 1.242E-13 6.556E+84 9.637E+85 0.1000000 
6947 6.9086E-10 1.0000E-13 ( 2.500E-04, 4.890E-02, 0.00 ) | 1.242E-13 6.556E+84 9.526E+85 0.1000000 
#1:q1dot,eint1,energy1LogRate: -7.2481739946513920E+024 NaN 1.7976931348623157E+308 
#2:q2dot,eint2,energy2LogRate: 7.2481739946513920E+024 NaN 1.7976931348623157E+308 
6948 6.9096E-10 1.0000E-16 ( 4.225E-02, 3.830E-02, 0.00 ) | 1.242E-13 6.555E+84 5.563-209 0.1000000 

Newton-Raphson failed in multitemp, multitype Eos.F90 
MODE_DENS_EI_ION 
INPUTS: 
mass density = 5.783263812696812E-03 
ion specific internal energy = NaN 

CURRENT ITERATION: 
ion specific internal energy = NaN 
ion temperature = NaN 
mass fractions: 
cham 1.000000000000001E-99 
targ 1.000000000000000E+00 

too many iterations, reached 50 

k = 1 1 1 
temp = NaN 
dens = 5.7832638126968120E-003 
pres = NaN 

Driver_abort called. See log file for details. 
Error message is [Eos] Error: too many iterations in Newton-Raphson 
Calling MPI_Abort() for shutdown in 2 seconds! 

-------------------------------------------------------------------------- 
MPI_ABORT was invoked on rank 0 in communicator MPI_COMM_WORLD 
with errorcode 1. 

NOTE: invoking MPI_ABORT causes Open MPI to kill all MPI processes. 
You may or may not see output from other processes, depending on 
exactly when Open MPI kills them. 


Does anyone know why I am having this problem and how to fix it ?? 

Thank you very much for any suggestions on this, 

All the best, 

Antoine 



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