ELI5: Explain Like I'm 5

Logarithmic law of the wall

Alright little buddy, let's talk about the logarithmic law of the wall. It's all about how air moves over things like planes, cars or even your little kite!

You see, when air flows over a surface, it may become turbulent and start to swirl around. It's the same reason why you see those little tornadoes on the playground on a windy day!

The logarithmic law of the wall is a formula used by scientists to understand how air moves in these situations. It predicts the speed of the air at different distances from the surface, and it uses a special kind of math called logarithms.

Think of it like this: imagine you're trying to climb up a really steep hill. At first, it's pretty easy because you're close to the bottom. But as you get higher and higher, it gets harder and harder to keep going, right?

Well, the same thing happens with air flow over a surface. The closer the air is to the surface, the slower it moves. But as it gets farther away, it moves faster and faster, just like you would when climbing that steep hill.

So, the logarithmic law of the wall helps scientists calculate how fast the air is moving at different distances from the surface. It's an important tool for understanding how things move through the air, and it can help people design safer, more efficient planes and cars.

But don't worry, little buddy, you don't have to understand all the complicated math behind it to appreciate how cool it is to see things flying through the air. Just keep flying your kite and having fun!