Stuff I Did This Summer

Or: The Effect of Spherical Confinement on a Monodisperse Colloidal Suspension using Brownian Dynamics Simulation

Or: Everything I Never Wanted to Learn About Diffusion

After it was all said and done, I was left with some graphs, several gigabytes of free software on my computer, and approximately ten million data points. I’m actually not even exaggerating. The program I worked with kept track of the positions of hundreds to thousands of particles for several hundred time steps, and that’s a lot of data.

How I ended up doing research is yet another of my “Well, it’s kind of a funny story” stories. I met with one of my professors to talk about working on the project I had worked on the past summer. She said, sure, I could work on it, but how about research? It would involve coding in Fortran. I hadn’t programmed anything since my freshman year Intro to MATLAB class and told the professor so. No problem, she said, you’ll be fine.

Okay, then. After talking to the grad student I’d be working with, I decided to do research over the summer, because why not? And that’s how I ended up reading research papers about exciting topics such as long-time self-diffusion and modeling hydrodynamic interactions while coding in Fortran to confine imaginary spherical particles in a larger imaginary spherical cavity. When I told my dad I was working in Fortran, he asked if people were still coding things in Fortran. Apparently so.

My job over the summer was to modify existing Brownian dynamics code to simulate particles enclosed in a sphere. By tracking their positions and collisions, you can do magic math to determine properties of the fluid. I also got to edit Python code (another language I had never seen before in my life), and do post-processing on my millions of data points.

All of this mostly took place in Olin, making it two consecutive years of not being out of Olin for longer than two weeks, discounting winter break. I was jammed into a corner of the group office with two grad students, but I had my own desk and I could see out of a window, which instantly elevated the space over the senior/undergrad lounges. Actually, lounge is a bit of a misnomer, because there’s very little lounging done in the lounge. A lot of last-minute-deadline-meeting, procrastinating, complaining, some sleeping and eating, but not much on the relaxation front. Which makes it the natural place for many of the seniors to congregate during their final year. #FunInTheSunDingyGreyBasement #ChemELife

Anyway, in the end, when summer was over, I learned some stuff about colloids and computational microrheology. I had fun, because I’m a nerd like that.