Blake number
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Short description: Dimensionless number in fluid dynamics
In fluid mechanics, the Blake number 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. It is named after the US chemist Frank C. Blake (1892–1926).[1]
Expressed mathematically the Blake number B is:[2]
where
ε = void fraction μ = dynamic viscosity ρ = fluid density Dh = hydraulic diameter u = flow velocity
References
- ↑ Massey, Bernard Stanford (1986) (in en). Measures in Science and Engineering: Their Expression, Relation, and Interpretation. E. Horwood. ISBN 978-0-470-20331-6. https://books.google.com/books?id=ebEeAQAAIAAJ&q=Measures%20in%20science%20and%20engineering%20:%20their%20expression,%20relation,%20and%20interpretation%20by%20Massey,%20B.%20S.%20(Bernard%20Stanford).
- ↑ 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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