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Forced Flow vs. Natural Flow of Fluids


In fluid mechanics and heat transfer, there are different classifications of fluid flows according to the different aspects. One of these classifications is the natural flow and the forced flow of fluids. According to this difference, the calculation method and approach change both for fluid mechanics and heat transfer. So, you will learn the difference between the forced flow vs. natural flow.

forced flow vs. natural flow
Fluid flow(Image Source: Pixabay.).

What is Natural Flow? 

The natural flow of the fluid takes place with the buoyancy effect between fluids. In the buoyancy effect of the fluids, the warmer fluid flows to the upper side and the cold fluid flows to the below side. We call this place exchange between the fluids because of the temperature difference as buoyancy effect. And we call the fluid flows because of the buoyant effects natural flows. 

What is the Forced Flow of Fluids? 

The forced flow of fluids is commonly used in most mechanical systems. As its name implies that in the forced flow mechanism, flow takes place with the external force such as pumping the fluid through the piping systems or flowing air with fans through systems to be cooled. 

In general, engineers are using forced flow calculations in most practical engineering calculations. Force flow effects are very important in heat transfer also. 


The main difference between forced flow vs. natural flow in fluid mechanics and heat transfer is very simple like above. 

In different kinds of engineering calculations such as heat transfer and thermodynamics, we use these terms. So, it is very important to know the differences between forced flow and natural flow as an engineer. There are various kinds of practical applications of them.

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