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4. Flow through a particle bed
4.1 Darcy's law. Definition of permeability
Consider a pipe of cross-section S containing a porous bed of height Z through which flows a liquid of viscosity η at a volume flow rate q
v
(figure
7
). Darcy observed that the pressure drop ΔP across the bed is proportional to the bed height Z, the empty-barrel velocity, or mean velocity,
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Flow through a particle bed
Bibliography
Fluid viscosity
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The Ultimate Scientific and Technical Reference