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Superdroplet

This is a collection of implementations of the Shima et al, 2009 Superdroplet algorithm for simulating stochastic collision/coalescence by a nascent droplet population, with modifications based on Arabas et al, 2015.

Because if its (relative) complexity, this algorithm is my go-to "hello world" scientific programming applicaiton. It has enough meat to really dive into some of the nitty, gritty details of how to properly structure code and how to leverage idiosyncrasies of data structures in those languages to accelerate things. It can be ported to the GPU, it can be parallelized, it can benefit from OO techniques, and much, much more.

So far, as contained in this repository, I've implemented the algorithm in at least 5 dialects:

  1. Python with Cython
  2. Python with numba
  3. C++11
  4. Fortran 2008
  5. Julia

Sample Animations

Example 1) Medium-sized cloud droplets with a Golovin kernel

sample simulation 1

Example 2) Small-sized cloud droplets with a Hall kernel

sample simulation 2

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Implementations of Superdroplet method for solving stochastic collision/coalescence

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