Blake Number

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Blake Number

Blake number ( \(Bl\) ) (dimensionless number) is proportional to inertial force and viscous force and is used in momentum transfer and flow through beds of solids.

Blake Number FORMULA

\(\large{ Bl = \frac {V \rho}  {\mu \left( 1- \epsilon  \right) s}   }\)         

\(\large{ Bl = \frac {G}  {\mu \left( 1- \epsilon  \right) s}   }\)         


\(\large{ Bl }\) = Blake number

\(\large{ \epsilon }\)  (Greek symbol epsilon) = void fraction

\(\large{ G }\) = mass velocity

\(\large{ \rho }\)  (Greek symbol rho) = density

\(\large{ s }\) = particle area or volume

\(\large{ \mu }\)  (Greek symbol mu) = viscosity

\(\large{ V }\) = velocity


Tags: Equations for Force