WHERE WE USE BERNOULLI’S PRINCIPLE??

 

BERNOULLI’S PRINCIPLE OF FLUID FLOW

                                         

According to the Bernoulli’s principle, an increase in the speed of a fluid results in a decrease in its pressure, or vice versa. In other words, velocity of a fluid flowing can be calculated from the pressure difference.  This principle is the basis for many practical applications of daily life and laboratory practice.

The principle is named after Daniel Bernoulli who published it in his book Hydrodynamica in 1738.

DAILY LIFE EXAMPLE

• Bunsen burner
•  Pitot tube

BUNSEN BURNER

The Bunsen burner is a laboratory device which is used to heat, sterilize or combust materials. In order to have a hotter flame than using the ambient air and fuel gas alone, flammable gas is premixed with air before ignition. Gas-air mixture velocity is adjusted with the throat holes. From the holes, high pressure air enters the burner, but the fuel gas does not escape due to its low pressure. 

PITOT TUBE

Pitot tube is a device measuring fluid flow velocity in order to calculate the fluid pressure; especially for calculating the airspeed of an aircraft. Open end of the device is placed on the wing facing toward the flow and due to the pressure difference the aircraft velocity can be calculated.