Fluid Dynamics

 Fluid Dynamics

What is Fluid? Fluid is any substance that can flow. Such as liquids and gases. This means they can change their position with ease. And water waves are also examples of flowing.

What is Fluid dynamics?

In physics we have two major categories of fluid, in detail, there are more but two are major

1)      Fluid Statistics: Fluid statistics is the study of fluid behavior in Rest, we study all conditions of fluid I which is in rest.

2)      Fluid dynamics: Fluid dynamics is the study of fluid in motion, we learn how the pressure on water acts? What is the relation of speed and pressure? And how do they relate? And much more

So, but we have no concern with fluid statistics, today we are going to know how about fluid dynamics.

So you have ever thought about how perfume changes liquid into tiny particles of liquid and spreads? How does airplane fly in air? How the spinning of cricketer can relate with Fluid Dynamics.

There are a lot of topics but today let’s talk about Bernoulli’s theorem and law of continuity

Bernoulli’s Theorem: states that if pressure of Fluid increases velocity will decrease and if velocity increases pressure of fluid will automatically decreases. So when you press the nozzle of the spray, the liquid in it will pass from the thin pipe which increases the speed of the perfume, the pressure decreases and they get separate from each other.

Airfoil is designed, for minimum resistance of air, as you can see in vehicles. Same idea is applied for airplane, wings of plane is designed as to cross air perfectly. The upper of wing is designed whereas the bottom surface of wing remains flat. When air crosses the wing speed of air increases which decrease the pressure and vacuum is created on the above side of airplane which lead airplane to fly. This is the reason why the flights are delayed due to winds.

Law of continuity: it states that if an incompressible fluid is passing throw pipe with some cross sectional area, so if pipe is wider from start and narrower from the en

d, but the mass flow rate at both points will remain same. As in narrow paths speed of fluid will increase and in wider paths speed of fluid will decrease.

You can check the derivation of both theories, but I just tried to give you a bit of information.

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