What are numerical simulations?

Numerical simulations are like playing with building blocks to understand how things work in real life.

Imagine you have a big pile of blocks, and you want to know what happens when you push them all at once. Instead of pushing the whole pile, you use smaller blocks, each one represents part of the bigger pile. You move these little blocks around according to simple rules, like how they would behave if you really pushed them. By doing this again and again, you can see what the big pile would look like after the push, without ever touching it!

Think of numerical simulations as a game where you use small pieces to guess what will happen in the real world. You follow simple rules (like how blocks move), and by playing the game many times, you get close to the answer.

This is exactly what scientists do when they want to know how weather changes, how cars crash, or even how planets move, they break big problems into small parts, play their own special game with them, and watch what happens!