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Fun Facts


Fun and interesting topics about Vaccon's Vaccum Technologies

Vaccon VP Series vaccum pumps employ the Venturi Effect to create vaccum. The Venturi effect is the phenomenon that occurs when a fluid that is flowing through a pipe is forced through a narrow section, resulting in a decrease in its pressure and an increase in its velocity (or speed). The Venturi Effect is similar to the behavior seen when one puts their thumb over the end of a garden hose. The fluid, in this example water, will increase in speed. In a venturi vacuum pump, the same effect occurs with the fluid (air) passes through the narrowed section in the pump cartridge. The fluid's increased velocity in both examples creates a pressure decrease, or vacuum. 

The Venturi effect is used in modern devices such as carburetors, water aspirators, cargo eductors, water evacuation from ship bilges, atomizers, wine aerators. and foam firefighting nozzles.

Italian physicist Giovanni Battista Venturi, a priest and scientist who lived from 1746-1822, discovered the effect, and is also credited with the invention of the Venturi pump.

Read more about the Venturi Effect and Giovanni Venturi.
Giovanni Battista Venturi

The priciple operating in a venturi vacuum pump where a fluid's increase in velocity occurs simultaneously with a decrease in it's pressure is described by Bernoulli's Principle, discovered by Daniel Bernoulli, a Swiss mathematician and physicist, and comtemporary of Venturi.

The Bernoulli Principle explains phenomena such as how an airplane's wings create the lift which allows it to fly, and how the read-write components in a hard disk drive float above the disk allowing data to be read and written to the drive.

Read more about Bernoulli's Principle and Daniel Bernoulli.

Daniel Bernoulli

Vaccon's CDF Series of Air Amplifiers employ the Coandâ Effect to achieve a dramatic air amplification ratio of up to 40:1 (input:output). The Coandâ Effect was discovered by Henri Coandâ, a Russian scientist, inventor and aerodynamics pioneer during the early to mid 20th century. The Coandâ Effect descibes how a jet of fluid or gas tends to stay "attached" to a convex surface

A practical example of the Coandâ Effect is a ceiling mounted air conditioning vent. The air discharged from the vent actually "sticks" to the ceiling, travelling further, covering a greater area. The video link below Coandâ's portrait illustrates the 
Coandâ Effect with a toy ball suspended above a jetstram of air produced by a CDF air amplifier. The air steam curves below the lower side of the ball, preventing it from falling. The force of the air stream keeps it above the CDF exhaust, and gravity prevents the ball from being blown away. 

Henri Coandâ is considered by some to be the inventor of the world's first jet engine. 

Read more about the Coandâ Effect and Henri Coandâ

The Coanda Effect allows a ball to be  
suspended in the air stream exiting  
a CDF Air Amplifier.  Watch the video.  
Henri Coanda

  This graphical timeline shows the history of vacuum science from 1500 to the present day. The timeline highlights the scientsts who contributed to vacuum science along with their breakthroughs and discoveries, Important products which utilize vacuum are also listed with the dates they were invented.

Thanks to the American Vacuum Society for this publication.
  AVS Vacuum Science Timeline - 1500 to Present

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