Reynolds number, what is it and how to calculate it

Reynolds number Gianluca Dotti Carlo Bergonzini what how calculate infographic

Reynolds number, what is it and how to calculate it – Gianluca Dotti & Carlo Bergonzini

A bacterium moving in the water is equivalent to a man swimming in the sand, and a dolphin can move in the sea with the same ease of a bird hovering in the air.

These considerations arise from the knowledge of the Reynolds number, a engineering parameter that allows to figure out which swimmers have a laminar or a turbulent flow.

Dolphins are efficient swimmers and move through the water faster than fishes. This is reason why their Reynolds number is so high, despite their length is comparable to that of a big fish. In just one second, dolphins can travel a distance equivalent to ten times their length. In the same time period, however, the bacteria in the water can move just a tenth of their size.

The Italian version of this infographic is available here.

Advertisements

Una risposta a “Reynolds number, what is it and how to calculate it

  1. Pingback: Il numero di Reynolds, cos’è e come si calcola | Stillatizio latino·

Rispondi

Inserisci i tuoi dati qui sotto o clicca su un'icona per effettuare l'accesso:

Logo WordPress.com

Stai commentando usando il tuo account WordPress.com. Chiudi sessione / Modifica )

Foto Twitter

Stai commentando usando il tuo account Twitter. Chiudi sessione / Modifica )

Foto di Facebook

Stai commentando usando il tuo account Facebook. Chiudi sessione / Modifica )

Google+ photo

Stai commentando usando il tuo account Google+. Chiudi sessione / Modifica )

Connessione a %s...