Dean Number

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Dean Number

Dean number ( \(De\) ) (dimensionless number) is used in momentum transfer for the flow in curved pipes and channels.

Dean Number FORMULA

\(\large{ De = \sqrt {   \frac  { \frac {1} {2}  F_i F_c } { \eta }  }  =  Re \; \sqrt { \frac  { D }  { 2  r_c }  }   }\)         

Where:

\(\large{ De }\) = Dean number

\(\large{ Re }\) = Reynolds number

\(\large{ D }\) = diameter

\(\large{ r_c }\) = radius of curviture of the path of channel

\(\large{ F_c }\) = centripetal force

\(\large{ F_i }\) = internal force

\(\large{ \eta }\)  (Greek symbol eta) = vciscous force

 

Tags: Equations for Flow Equations for Fluid