The Venturi Effect

Requires a Wolfram Notebook System

Interact on desktop, mobile and cloud with the free Wolfram CDF Player or other Wolfram Language products.

Requires a Wolfram Notebook System

Edit on desktop, mobile and cloud with any Wolfram Language product.

A fluid flowing through a constricted section of a tube undergoes a decrease in pressure, which is known as the Venturi effect. This is fundamentally a consequence of Bernoulli's principle, which relates the pressure of a fluid to its velocity , :

[more]

,

where is the density, assumed constant for an incompressible fluid. The equation of continuity determines the velocity of a fluid of given density through a section of tube with radius . You can vary the radius of the constriction between 1 and 5 cm. Quantitative details depend on additional factors, such as the viscosity of the fluid and the roughness of the tube walls. The results given in this Demonstration can be considered as representative.

The drop of fluid pressure is indicated by the difference in fluid levels in the two vertical capillary tubes. The Venturi-tube flowmeter operates on this principle.

[less]

Contributed by: S. M. Blinder (March 2011)
Open content licensed under CC BY-NC-SA


Snapshots


Details

Reference: H. Lamb, Hydrodynamics, ed., Cambridge: Cambridge Univ. Press, 1953.



Feedback (field required)
Email (field required) Name
Occupation Organization
Note: Your message & contact information may be shared with the author of any specific Demonstration for which you give feedback.
Send