Ellipsoidal particles in spherical solvent (LAMMPS)
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Ellipse sample from LAMMPS packages
Ellipsoidal particles in spherical solvent, 2d system. The example used here is identical to the version released with LAMMPS, with the following exceptions:
- Time-step is halved.
- Run times increased to 1,000,000.
- Saves a movie.
Prepare Example Directory
First, make sure we are at the root of our home directory
user $cdNow, make an example directory, and copy the ellipse example directory into it.
user $mkdir examplesuser $cp -r {{HPC-Examples-Dir}}Parameter unnamed not defined. For correct usage see template's documention./lammps/ellipse examples/user $cd examples/ellipseuser $lsellipse.gayberne.lmp
We also need a script to submit the job to the cluster. Lets start with the sample script in
{{HPC-Base-Dir}}
Parameter unnamed not defined. For correct usage see template's documention.
by copying it to our new ellipse example directory.
user $cp {{HPC-Base-Dir}}Parameter unnamed not defined. For correct usage see template's documention./torque-lmp.sh .user $lsellipse.gayberne.lmp torque-lmp.sh
The torque-lmp.sh script should look something like this:
FILE
torque-lmp.sh(original)#PBS -l walltime=10:00:00,mem=15gb,nodes=1:ppn=16 ##PBS -M EmailAddress ##PBS -m bae #PBS -q default #PBS -N Jobname #PBS -o myoutput.txt #PBS -j oe . $(which lmp-config) # The LAMMPS input file must have a '.lmp' extension (e.g., mysimulation.lmp). INPUTFILE=mysimulation doLAMMPS
Modify Queue Submission Script
change name of job from to ellipse-lmp change INPUTFILE from mysimulation to ellipse.gayberne Should look like this:
FILE
torque-lmp.sh(edited)#PBS -l walltime=10:00:00,mem=15gb,nodes=1:ppn=16 ##PBS -M EmailAddress ##PBS -m bae #PBS -q default #PBS -N ellipse-lmp #PBS -o myoutput.txt #PBS -j oe . $(which lmp-config) # The LAMMPS input file must have a '.lmp' extension (e.g., mysimulation.lmp). INPUTFILE=ellipse.gayberne doLAMMPS
Submit Job
user $qsub torque-lmp.shuser $qstatJob ID Name User Time Use S Queue ------------------------- ---------------- --------------- -------- - ----- 14222.flory ellipse-lmp user 00:00:35 R default
Check Results
About 4 minutes later:
user $ls -lhtotal 22M -rw-r--r-- 1 user user 1.8K Dec 20 17:25 ellipse.gayberne.lmp -rw-rw-r-- 1 user user 1.5M Dec 20 17:29 ellipse.gayberne.out -rw-rw-r-- 1 user user 398 Dec 20 17:26 log.cite -rw-rw-r-- 1 user user 20M Dec 20 17:29 movie.mkv -rw------- 1 user user 730 Dec 20 17:29 myoutput.txt -rwxr-xr-x 1 user user 293 Dec 20 16:14 torque-lmp.sh
user $cat myoutput.txt-------------- lmp-config (BEGIN) -------------- Start time : Tue Dec 20 17:25:51 EST 2016 PBS_JOBID : 14222.flory.usm.edu Working Directory: /home/user/sims/gnu-openmpi/examples/ellipse MPI command : /home/user/shared/gnu-openmpi/bin/mpirun LAMMPS command : /home/user/shared/gnu-openmpi/bin/lmp LAMMPS script : /home/user/sims/gnu-openmpi/examples/ellipse/ellipse.gayberne.lmp Processes : 16 Controlling Node : n005.cluster.com Nodes : n005.cluster.com (16) Command: mpirun lmp -in "ellipse.gayberne.lmp" -log "ellipse.gayberne.out" -screen "none" Stop time : Tue Dec 20 17:29:39 EST 2016 Elapsed time : 0 days 00h 03m 48s -------------- lmp-config ( END ) --------------
copy movie.mkv to your computer and watch the animation.
movie 1m23sec
1st half of movie the box is shrinking, but the movie is zooming in at same rate which is why it looks like the particles are getting larger.