“How can we add energy to a fluid with one simple part?”


Fluids are so useful for doing things! But sometimes our fluid doesn’t have enough energy inside it. So how can we use our engineering mindset to solve this problem? Well, what if we were to use a mechanical motor with a hole in it, and if we were to pass our fluid through it? Then the fluid would gain energy from the rotational motion. Well, it turns out that this solution actually works and is known as an impeller. This added energy can change the pressure of a fluid, and energy can even be decreased if we use smart planning! In fact, it turns out that turbines are a specific form of an impeller.  

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