Blake number
From HandWiki
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:
- [math]\displaystyle{ B = \frac{u \rho D_h}{\mu ( 1-\epsilon)} }[/math]
where
ε = void fraction μ = dynamic viscosity ρ = fluid density Dh = hydraulic diameter u = flow velocity
External links
- Tomas, J. (2010). "Mechanical Process Engineering – Particle Technology". Otto von Guericke University of Magdeburg. http://www.uni-magdeburg.de/ivt/mvt/englisch/Vorlesung/Lecture_MPE/Fig_MPE_4.pdf. Retrieved 11 February 2011.
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