Parameter | Description |
| Outlet mixture density (kg/m3) |
| Concentrated pressure losses at pipe entrance |
| Concentrated pressure losses at pipe outlet |
| Total mass flow (kg/s) |
A | Flow area (m2) |
D | Pipe diameter (m) |
P | Pressure (Pa) |
G | gravity acceleration |
L | channel length |
ZB | boiling length |
| the liquid density |
| Two-phase friction factor |
f | Single-phase friction factor |
| Phase change number |
| Subcooling number |
| Thermodynamic quality |
vfg | Difference between the specific gas and liquid volumes vg ? vf |
| Friction factor number |
| Mass flow rate fraction of channel i |
| Mass flow rate fraction of channel 1, 2 |