Figure 1.
Figure of the analyzed room
Figure 2.
Numerical mesh (symmetry plane visible)
Table 2.
Numerical model summary
| Feature | Value | |
|---|---|---|
| Turbulence model | k-omega SST | |
| Combustion model | Non-premixed combustion | |
| Fuel | Methane (CH4) | |
| Fluid material | Mixture (according to PDF table, ideal gas) | |
| Operating pressure | 10325 Pa | |
| Temperature | 288 K | |
| Gravitational acceleration | 9.81 m/s2 | |
| Solver | Pressure based | |
| Calculation mode | Transient | |
| Pressure / velocity coupling | Simple | |
| Under-relaxation factors | Pressure | 0.3 |
| Momentum | 0.2 | |
| Energy | 1.0 | |
| Others | Default | |
| Calculation mode | Transient | |
| Time step | Adaptive (0.001 – 0.6 s) |
Figure 3.
Temperature distribution at two time moments for Case1
Figure 4.
Mass fraction of CO2 distribution at two time moments for Case1
Figure 5.
Distribution of mass fraction of O2 at two time moments for three Cases [kg/kg]
Figure 6.
Distribution of mass fraction of CO2 at two time moments for three Cases [kg/kg]
Figure 7.
Distribution of temperature at two time moments for three Cases [K]
Figure 8.
Distribution of air velocity vectors at two time moments for three Cases [m/s]
Figure 9.
Variability in time of mass fraction of O2 at the height of 2.0 m (left tree).
Figure 10.
Variability in time of volume flow rate through vent A
Figure 11.
Variability in time of temperature [K] at the height of 0.5 andw 2.0 m (left tree)