Effects of Heat Transfer Characteristics of R32 and R1234yf with Al₂O₃ Nanoparticle through U-Bend Tube Evaporator

Table 2

Boundary conditions.

Parameter	Setup/value
Type wall	Phase solid
Wall thickness	1.9 mm
Temperature	300–400 K
Inlet-boundary
Type	Inflow
Phase	Multiphase (mixture)
Mass flux	35–160 kg/m^2·s
Inlet temperature	273 K
Gauge pressure	0.816 MPa
Outlet-boundary
Type	Outflow