http://geosci.uchicago.edu/~cdieterich/swom/ swom - Shallow Water Ocean Model: swom is a Python package that implements a shallow water ocean model. It is designed as a modular and extendable toolbox to interactively develop Arakawa A through D grid numerics of the shallow water equations. Fast and parallelized arithmetics and numerics provide the necessary efficiency for subsequent modeling experiments.
MIT Sandbox Scientific visualization of water flow/effects Provides a graphical interface for a particular modeling mechanism (CHILD) which simulates water flow patterns (such as streams and mudflows). Python interface to C++ visualization engine.
in a molecular level there is an example of " lysozyme in water" in http://www.python.org/about/success/mmtk/
has it been done with pure numerical python (NumPy)? apparently swom has adapting to NumPy in the todo.