Have you ever wondered what's actually happening when water flows? 
Well let's take a look!
Here we have three garden hoses.
At a glance their water flow looks identical;
but if we insert a thin constant through each hose we'll see that their flow is actually quite different.
In the top hose, the water molecules are flowing in a very orderly fashion and we call this laminar flow.
In the bottom hose, water molecules are flowing in a very disordered and turbulent manner; we call this turbulent flow.
In the middle hose, water flow is somewhere between laminar and turbulent flow; we call this transitional flow.
Now you may be thinking: the hoses are identical, so
so why is water flowing so differently through each of them?
That's a great question!
Well, this has to do with how fast the water is flowing.
The faster it flows, the more likely it is to be turbulent.
There are of course other factors that can affect how a liquid flows in a system,
including its density, viscosity, and also the diameter of the pipe itself.
Reynolds number combines all these variables in such a way that we can predict how a liquid will flow.
If you calculate Reynolds number to be less than about 2000, the liquid will likely to be flowing with laminar flow.
Any value above 4000 indicates turbulent flow, and any
and any value between the two means the liquid is transitioning or fluctuating between the two flows.
We'll look at Reynolds number in more detail in future videos but for now you just need to know that
Laminar flow is when liquids are flowing in a very ordered fashion;
turbulent flow is when flow is very disordered;
turbulent flow is when flow is very disordered;
transitional flow is a fluctuation between the two flows;
and both properties of the liquid and the pipe it's flowing through will determine how a liquid flows.
We hope you found this video useful. As always you can find a link to the written tutorial in the description box below.
Check it out and if you've got any questions don't hesitate to directly message us through YouTube,
or send us an email to NinetyEastTV@gmail.com.
Thanks everyone!
