Viewing posts by christian
A simple two-dimensional Brownian motion animation
Posted by: christian on 3 Jul 2019
This code continues the previous blog post on two-dimensional collisions to model Brownian motion. The code is on my GitHub page.
Two-dimensional collisions
Posted by: christian in Featured on frontpage on 24 Jun 2019
This small Python project is a physical simulation of two-dimensional physics. The animation is carried out using Matplotlib's FuncAnimation method and is implemented by the class Simulation. Each "particle" of the simulation is represented by an instance of the Particle class and depicted as a circle with a fixed radius which undergoes elastic collisions with other particles.
Packing circles inside a shape
Posted by: christian in Featured on frontpage on 5 Jun 2019
A previous blog post dealt with packing circles into a circle. To fill an arbitrary shape, a slightly different approach is needed. The code is presented in my github repo.
Packing circles in a circle
Posted by: christian on 2 Jun 2019
The following code attempts to pack a predefined number of smaller circles (of random radii between two given limits) into a larger one.
The Morse oscillator
Posted by: christian on 11 May 2019
The Morse oscillator is a model for a vibrating diatomic molecule that improves on the simple harmonic oscillator model in that the vibrational levels converge with increasing energy and that at some finite energy the molecule dissociates. The potential energy varies with displacement of the internuclear separation from equilibrium, $x = r - r_\mathrm{e}$ as: $$ V(x) = D_\mathrm{e}\left[ 1-e^{-ax} \right]^2, $$ where $D_\mathrm{e}$ is the dissociation energy, $a = \sqrt{k_\mathrm{e}/2D_\mathrm{e}}$, and $k_\mathrm{e} = (\mathrm{d}^2V/\mathrm{d}x^2)_\mathrm{e}$ is the bond force constant at the bottom of the potential well.