Wall-to-Bed Heat Transfer at Minimum Gas-Solid Fluidization

Table 1

Properties of the components of the powder gas system used in calculations.

Powder	Sphericity, (—)	(W/mK)
Silica sand	0.85 = rounded; 0.67 = angular	0.180
Glass beads	1.0	0.092
Cracking catalyst	0.60	0.138
Diakon spheres	1.0	0.243