Fig 1.
Flowchart of the DEM algorithm.
Fig 2.
Schematic diagram of the funnel.
(a) slit funnel;(b) slit baffle funnel.
Table 1.
Funnel geometry parameters.
Table 2.
Particle parameters.
Fig 3.
The relationship between flow rate and funnel outlet width and funnel half-angle.
The funnel outlet width W ranges from 1.1 to 10 d and the funnel half-angle θ is equal to 30°, 45°, and 60°.
Fig 4.
The clogging probability J(d) in a slit funnel.
Funnel half-angle θ is equal to 30°, 45°, and 60°. The illustration shows the total number of particles discharged from the funnel before the funnel clogged.
Fig 5.
Side view of slit baffle funnel.
The red arrow is the direction of particle flow.
Fig 6.
The flow rate of R1 in the slit baffle funnel.
Where H = 10 d and the red dotted line is the flow rate of slit funnel.
Fig 7.
The flow rate of R2 in the slit baffle funnel.
Where H = 10 d.
Fig 8.
The proportion of R2 flow rate in the slit baffle funnel out of the total flow rate.
The value of baffle height H is taken as 10 d.
Fig 9.
Detail flow rate in the slit baffle funnel along the y-direction.
Where the funnel half-angle θ is 30° and the baffle height H is 10 d. The black dashed line indicates the baffle.
Fig 10.
Velocity field diagram of particles inside the slit baffle funnel.
The funnel outlet width W = 1.5 d, the funnel half-angle θ = 30°, and the baffle height H = 10 d. (a) Velocity field in the x-direction; (b) velocity field in the y-direction; (c) velocity field in the z-direction; and (d) total velocity field.
Fig 11.
Velocity diagram of particles flowing out of the slit baffle funnel along the y-direction.
Wherein, the funnel outlet width W = 1.5 d; the funnel half-angles θ are 30°, 45°, and 60° and the baffle height H is equal to10 d. The black dashed line in the figure indicates the baffle. (a) Outflow velocity in the x-direction; (b) outflow velocity in the y-direction; (c) outflow velocity in the z-direction.
Fig 12.
Variation of flow rate with baffle height in a slit baffle funnel.
The funnel half-angle θ is equal to 30° and the funnel outlet width W ranges from 1.1 to 2.0 d. (a) Variation of R1 flow rate and (b) variation of R2 flow rate.
Fig 13.
The proportion of R2 flow rate in slit baffle funnel with different baffle heights.
Where funnel half-angle θ is equal to 30° and the outlet width W ranges from 1.1 to 2.0 d.
Fig 14.
Variation of R2 flow zone length with baffle height in slit baffle funnel.
Where L’ denotes the R2 flow zone length. (a)The funnel half-angle θ is equal to 30° and the outlet widths W equal to 1.3 d, 1.4 d, and 1.5 d; and (b) the funnel outlet width W = 1.4 d and the half-angle θ are 30°, 45°, and 60°.