jan
/
opencl_fdtd
2
2
Fork 1
Code Issues Pull Requests Releases Wiki Activity
OpenCL FDTD electromagnetic simulation in 3 dimensions
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
56 Commits
6 Branches
0 Tags
303 KiB
 
 
Branch: master
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from 'master'
${ noResults }
 ZIP  TAR.GZ
Jan Petykiewicz d5fd78d493
Revert "Add restrict keyword to pointers (not sharing the same memory for multiple fields)" 		2 years ago
opencl_fdtd Revert "Add restrict keyword to pointers (not sharing the same memory for multiple fields)" 2 years ago
.gitignore expand gitignores 2 years ago
LICENSE.md Use markdown for license 5 years ago
README.md move code to new location 4 years ago
fdtd.py Update example with bloch fields 3 years ago
pcgen.py Fix triangular lattice code in pgcgen 5 years ago
requirements.txt move code to new location 4 years ago
setup.py Use readme as long_description 3 years ago

README.md

opencl_fdtd

opencl_fdtd is a python application for running 3D time-domain electromagnetic simulations on parallel compute hardware (mainly GPUs).

Performance highly depends on what hardware you have available:

  • A 395x345x73 cell simulation (~10 million points, 8-cell absorbing boundaries) runs at around 91 iterations/sec. on my AMD RX480.
  • On an Nvidia GTX 580, it runs at 66 iterations/sec
  • On my laptop (Nvidia 940M) the same simulation achieves ~12 iterations/sec.
  • An L3 photonic crystal cavity ringdown simulation (1550nm source, 40nm discretization, 8000 steps) takes about 3 minutes on my laptop.

Capabilities are currently pretty minimal:

  • Absorbing boundaries (CPML)
  • Perfect electrical conductors (PECs; to use set epsilon to inf)
  • Anisotropic media (eps_xx, eps_yy, eps_zz, mu_xx, ...)
  • Direct access to fields (eg., you can trivially add a soft or hard current source with just sim.E[ind] += sin(f0 * t), or save any portion of a field to a file)

Installation

Requirements:

  • python 3 (written and tested with 3.5)
  • numpy
  • pyopencl
  • jinja2
  • fdfd_tools

Optional (used for examples):

To get the code, just clone this repository:

git clone https://mpxd.net/code/jan/opencl_fdtd.git

You can install the requirements and their dependencies easily with

pip install -r requirements.txt

Running

The root directory contains fdtd.py, which sets up and runs a sample simulation (cavity ringdown).

python3 fdtd.py