Little Black Dog Blog


& the art of over-engineering

Python wrapping LAMMPS/LIGGGHTS in Ubuntu 12.04

Update: I reformatted a computer in my lab with Ubuntu 14.04. I went through installing LIGGGHTS and the Python wrapper – along with an mpi4py instead of pypar for parallelizing with Python. It was actually much simpler than the process I’ve outlined here. I’m going to leave this here for...


The Pleasures and Pains of Coffee

This is a beautiful homage to coffee as written by the great Honore de Balzac (translated from the French by Robert Onopa). I am compelled to share it as I sit on the patio with a cup. And here it goes… Coffee is a great power in my life; I...


Switzerland photos

I’m pretty underwhelmed with many of the pictures I took from Switzerland, but they’re up on flickr. This one almost faithfully recreates the majesty of the Alps. This was taken on top of Rothorn, near Brienz. I think the major issue I have with all my pictures is simply that...


Pebble breaking in DEM pt. 2

The pebble breakage routine (introduced Pebble breaking in DEM) has received an upgrade but is still not complete. I’ve applied it here to a simulation of an oedemetric compression that we often do experimentally in the lab. There’s still not a lot of thought going into the criteria that decides...


Pebble breaking in DEM

The guts of my research for the last year or so has been on predicting the effects on the thermomechanics of a packed bed if there are individual pebbles in that bed that are cracking or breaking. This is important for fusion reactors because for the ‘solid breeder’ concept, we’d...