Table 1 Solution parameters in numerical simulation.
From: A numerical study on CO migration after blasting in high-altitude tunnel by inclined shaft
Parameter type | Parameter | Values and settings |
|---|---|---|
Gas parameter | Air density/(kg/m3) | 0.842 |
CO density/(kg/m3) | 0.814 | |
Temperature/K | 265.4 | |
Atmospheric pressure/(Pa) | 64,078 | |
Dynamic viscosity coefficient of air/(Pa⋅s) | 1.68 × 10−5 | |
Blasting parameter values | Throwing length of blasting fume/(m) | 82 |
Mass fraction of CO/(%) | 0.12 | |
Mass concentration of CO/(kg/m3) | 0.000976 | |
Solver settings | Time | Steady (before blasting) Transient (after blasting) |
Solver type | Pressure-based | |
Turbulence model | RNG k–ε | |
Velocity of inlet/(m/s) | 20 | |
Turbulent intensity/(%) | 2.64 | |
Hydraulic diameter/(m) | 1.8 | |
Solution Methods | SIMPLEC | |
Time step/(s) | 0.1 |
