Hello All,
I tried to run a 5year
simulation with RegCM4.5 with dx=25km and dt=30 secs but the model
stopped due to CFL violation after 6month simulation. I decreased the dt
to 25, 20 and 15 still the job got killed due the same reason, however
the simulation period varied each time.
Next I tried to run
a 2 year simulation with RegCM4.4 at the same combination of dx and dt
but again the problem occurred. I even tried changing the vertical
levels from 18 to 23 but no run was completed.
Next I changed the resolution to 50km and tried with following combinations:
ds=50km dt=150secs
ds=50km dt=120secs
ds=50km dt =100secs
But the same error as above is persisting.
I will be highly obliged if anyone can kindly advice for the same.
I have tried to run the job on 360, 300, 240 and 200 processors as well. However the message in each log file is as follows:
WHUUUUBBBASAAAGASDDWD!!!!!!!!!!!!!!!!
No more atmosphere here....
CFL violation detected, so model STOP
#####################################
# DECREASE DT !!!! #
#####################################
WHUUUUBBBASAAAGASDDWD!!!!!!!!!!!!!!!!
No more atmosphere here....
CFL violation detected, so model STOP
#####################################
# DECREASE DT !!!! #
#####################################
Abort called by computing node 345 at 2017-05-08 18:29:32.161 +0530
Abort called by computing node 329 at 2017-05-08 18:29:32.162 +0530
--------------------------------------------------------------------------
MPI_ABORT was invoked on rank 345 in communicator MPI COMMUNICATOR 3 DUP FROM 0
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.
--
Regards
Sudipta Ghosh
PhD Scholar, Center for Atmospheric Sciences
Indian Institute of Technology Delhi,India.