Table 2 Boundary conditions.

From: Influences of ventilation parameters on flow field and dust migration in an underground coal mine heading

Inlet

Type

velocity inlet

Specification method

Intensity and Hydraulic Diameter

Outlet

Type

outflow

Wall

Shear condition

no slip

DPM-boundary type

reflect/ escape

Injection properties

Injection type

surface (round); area:0.00785m3

Material

coal-hv; particle density:1400 kg/m3

Total flow rate

0.0012 kg/s

Diameter distribution

type: rosin-rammler; min. diameter:1μm; max. diameter:100μm; mean diameter:0.48μm; spread parameter: 3.5; number of diameters:15

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