Two previous challenge problems have developed a model and data structure for simulating the behavior of particles colliding in an environment and precipitating. These challenge problems are linked below:

http://hpcuniversity.org/students/weeklyChallenge/70/
http://hpcuniversity.org/students/weeklyChallenge/71/

Your task is to develop an algorithm for a simulation of the behavior previously described. The algorithm should be written in pseudocode, such that a human can easily read it, and such that it would not take much effort for a programmer to translate it into a procedural language like C, C++, Fortran, Java, or Python.

The algorithm should break tasks down into sub-tasks whenever possible and should utilize the data structure given.

An example algorithm is given below for finding the greatest common divisor of two numbers m and n, adapted from The Art of Computer Programming by Donald Knuth.

0. [Ensure m is bigger] If n is greater than m, swap m and n.
1. [Store remainder] Divide m by n, store the remainder in r.
2. [Remainder 0?] If r is 0, the algorithm terminates with answer n.
3. [Reduce] Store n's value in m, r's value in n, and loop back to step 1.