Blake number

From Wikipedia, the free encyclopedia
Jump to: navigation, search

The Blake number in fluid mechanics is a nondimensional number showing the ratio of inertial force to viscous force. It is used in momentum transfer in general and in particular for flow of a fluid through beds of solids. It is a generalisation of the Reynolds number for flow through porous media.

Expressed mathematically the Blake number B is:


ε = void fraction
μ = dynamic viscosity
ρ = fluid density
Dh = hydraulic diameter
u = flow velocity

External links[edit]