Parallel Computations in Fluid/Thermal Sciences

MAE 267 - Fall Quarter 2015
UC Davis
Prof: Roger Davis

Parallel computing methods for solving 2D heat transfer with explicity, finite-volume schemes using Fortran and MPI.

Projects

1. Serial, Single-Block Heat Conduction Solver

• Solve heat conduction numerically on a single, non-uniform, 2D grid
• Use one processor

2. Serial, Multi-Block Solver Intitialization

• Initialize solver solution for single processor with grid decomposed into sub-domains (blocks)
• Write block configuration files to restart solution

3. Serial, Multi-Block Solver

• Modify solver to solve heat conduction on multiple blocks
• Use ghost nodes to store neighbor information

4. Parallel, Multi-Block Solver Initialization

• Initialize solver solution for multiple processors with grid decomposed into sub-domains
• Distribute blocks to processors to achive equal load balancing
• Save configuration files for each processor to restart solution

5. Parallel, Multi-Block Solver

• Modify solver to solve heat conduction on multiple blocks with multiple processors
• Include MPI code for multiple processors

How To:

TO COMPILE A FORTRAN CODE (.f90 extension)

GNU Fortran:
'gfortran -o outname progname.f90'

Open MPI (parallel, optimized):
'mpif90 -o outname -O3 progname.f90'

Using project specific makefile:
'./make.sh'

INSTALL OPEN-MPI WITH FORTRAN SUPPORT

Homebrew tends to install open-mpi without fortran support.  To Fix:

'brew reinstall openmpi --build-from-source'

RUNNING COMPILED CODES ON FRONT-END AND HPC1 BATCH SUBMISSION:

MPI Parallel Run:
'mpirun -n NCPUS main > "a.out"'

Batch Job Submission on HPC1:
'sbatch run.sh'

BASH ALIASES FOR SLURM QUEUING SYSTEM:

alias fortmain='gfortran -o main main.f90'
alias q="squeue"
alias qq="squeue -u lhalstro"
alias qdel="scancel"
alias qsub="sbatch"

TO COPY FILES FROM REMOTE TO LOCAL (in local terminal):

'scp username@remoteaddress:path/to/file path/to/copy/to'

use -r to copy folders, i.e.:
'scp -r [email protected]:mae267/projects/pj5/Results projects/ucd/mae267/projects/pj5/.'

TO CHANGE FROM LOWER TO UPPER CASE IN SUBLIME TEXT:

'ctrl+k,u' (l for lower)