1. The file deltaP_pressure includes the pressure gradient, Δp, across the granular column for two monodisperse columns comprising the two nominal fractions of Ballotini glass beads, 355 μm and 63 μm and four bimodal granular column with a small to large beads ratio 50:50, 40:60, 25:75, 10:90. The values of Δp are in (Pa). The matrix contains 6 columns corresponding to granular mixtures: M355, M63, B40, B40, B25, B10, and 100 rows corresponding to 100 data points per mixture.

2. The file Q_air_flow_rate includes the corresponding air flux rate, Q, in (L min-1).


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3. The file stress includes the stress, σ, for two monodisperse columns comprising the two nominal fractions of Ballotini glass beads, 355 μm and 63 μm and four bimodal granular column with a small to large beads ratio 50:50, 40:60, 25:75, 10:90. The values of σ are in (Pa). The matrix is structured:

(data point, shear rate, air velocity, granular mixture), 

where shear rate, γ˙ = 0, 16, 49, 115, 213 s−1, air velocity, u = 0, 0.5 umf , 1.0 umf , 1.5 umf and 2.0 umf and 
granular mixtures: M355, M63, B40, B40, B25, B10.

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4. The file time includes the time, t, for two monodisperse columns comprising the two nominal fractions of Ballotini glass beads, 355 μm and 63 μm and four bimodal granular column with a small to large beads ratio 50:50, 40:60, 25:75, 10:90. The values of t are in (s). The matrix is structured:

(data point, shear rate, air velocity, granular mixture), 

where shear rate, γ˙ = 0, 16, 49, 115, 213 s−1, air velocity, u = 0, 0.5 umf , 1.0 umf , 1.5 umf and 2.0 umf and 
granular mixtures: M355, M63, B40, B40, B25, B10.
