# Transition layer thickness in a fluid-porous medium of multi-sized spherical beads

Transition layer thickness in a fluid-porous medium of multi-sized spherical beads Momentum and mass transfer at fluid–porous interfaces occur in many technical and natural applications. The vertical extend below a fluid–porous interface within which the free fluid velocity reduces to a constant Darcy velocity in the porous medium is known as Brinkman layer. Recently, the Brinkman layer thickness (δ) has been measured for a porous bed of mono-sized spherical beads, and was found to be in the order of the particle diameter (d). In this study, we investigate a porous medium made of multi-sized spherical beads. The measured averaged interfacial velocity field clearly indicated that, in the case of multi-sized beads, δ is in the order of a characteristic diameter given by $$(\sum_{i} \frac{x_i}{d_i})/(\sum_{i} \frac{x_i}{d_i^2})$$ with x i and d i being the weight fraction and diameter of the component i in the mixture. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

# Transition layer thickness in a fluid-porous medium of multi-sized spherical beads

, Volume 46 (2) – Sep 17, 2008
8 pages

/lp/springer_journal/transition-layer-thickness-in-a-fluid-porous-medium-of-multi-sized-sDBaqBltgd
Publisher
Springer-Verlag
Subject
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-008-0562-9
Publisher site
See Article on Publisher Site

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