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Permeability of open-pore microcellular materials

“…These plots are linear, showing that flow is indeed in the regime of validity of DarcyÕs law. Multiplying the slope of these lines with the viscosity l of the fluid yields the permeability K. Resulting values for K are given in Table 1 [5,21,[25][26][27]32] are added to the plot after division of reported permeabilities by reported average pore diameters squared.…”

“…Evolution of the permeability K normalized by the pore size squared d 2 as a function of the foam density V s . Discrete points are the measured data from the present study (the two symbols correspond to the two different pore size classes that are investigated, i.e., 75 and 400 lm) and data from publications in the literature [5,21,[25][26][27]32]. The lines are predictions according to Eq.…”

“…Characteristic foam parameters K and C of Eq. (1) have thus been measured by various authors for nickel foams [22,23] or for ERGÕs cast aluminium foams, at times compressed beforehand by plastic deformation along one direction to improve their heat-transfer characteristics (this, of course, renders the foams anisotropic) [3,5,6,9,16,[24][25][26][27].…”

Multiscale Modeling of Multiphase Fluid Flow

“…The simplest and commonly used expression = + (1 − ) is essentially the arithmetic mean. In PCM/micro-foam system, a more accurate can be obtained by experiments [197][198][199], or by DNS of real or ideal foam geometries [193][194][195][200][201][202]. In this paper, we have carried out DNS to find the effective thermal conductivity, which matches the Progelhoff model [15] = + (1 − ) with = 1.31 through the curve fitting, when pores in ideal foam structure is arranged in a BCC lattice [203].…”

Development of Open Pore Copper Foams to Use as Bipolar Plates in Polymer Electrolyte Membrane Fuel Cell Stacks

“…These non-linear variations could be with porosities higher than 0.3 would mainly occur in cell approximated using Hazen-Depuit-Darcy model which is wall regions [9]. So, increasing and thus decreasing widely accepted by several researchers [13][14][15] (1)…”