[Stabum]

Hello,
I'm trying to simulate a waterjet propulsion system (with an axial turbo pump and a "S" shaped duct upstream). I firstly adopted a robust convergence approach (Autotimescale, Lenght Scale Option = Conservative, Timescale Factor = 1). After 10 hrs computing I reached 1E-4 RMS with MAX Residuals 2 or 3 orders of magnitude higher.
I changed the Timescale control to Physical Timescale, with an avagage residence time = 0.15 s. No improvements. I increased it to 1.5 s. Nothing has really changed. I would try the "double precision" option but since I'm running these simulatons with a university cluster, I don't know which commands I should add to the .pbs file to activate this option and to start the new simulation from the old one (in order to use the data of the previous one).
Nobody has any idea about what to do.
Please, is there anybody able to help me? Thank so much and... excuse my terrible english.

Below I add the script I've been using so far.


#!/bin/bash -l
#PBS -N FolderName
#PBS -l nodes=1pn=16:NRM
#PBS -l walltime=999:00:00
cd $PBS_O_WORKDIR
cat $PBS_NODEFILE | sort > pnodes
export NCPUS=`cat pnodes | wc -l`
ANSYSLMD_LICENSE_FILE=****@***.***.***.***
export ANSYSLMD_LICENSE_FILE
ANSYSLI_SERVERS=****@***.***.***.***
export ANSYSLI_SERVERS
/opt/shared/ansys/v145/CFX/bin/cfx5solve -def CFX_02_1.def -par-local -partition 8 >> log.txt


Thanks again

[Lance]

Originally Posted by Stabum

/opt/shared/ansys/v145/CFX/bin/cfx5solve -def CFX_02_1.def -par-local -partition 8 >> log.txt

/opt/shared/ansys/v145/CFX/bin/cfx5solve -def CFX_02_1.def -double -initial-file myresultsfile.res -par-local -partition 8 >> log.txt
if you want to use the results file as initial conditons, or

/opt/shared/ansys/v145/CFX/bin/cfx5solve -def CFX_02_1.def -double -continue-from-file myresultsfile.res -par-local -partition 8 >> log.txt
if you want to continue the simulation.

[Stabum]

Originally Posted by Lance

/opt/shared/ansys/v145/CFX/bin/cfx5solve -def CFX_02_1.def -double -initial-file myresultsfile.res -par-local -partition 8 >> log.txt
if you want to use the results file as initial conditons, or

/opt/shared/ansys/v145/CFX/bin/cfx5solve -def CFX_02_1.def -double -continue-from-file myresultsfile.res -par-local -partition 8 >> log.txt
if you want to continue the simulation.

You're so kind! Thanks thanks so much!