Tibirica and Ribatski [6] reported that the channel with a diameter
of 2.3 mm was considered as the one in which the transition
between macro- and micro-scale flow boiling phenomena took
place when halocarbon refrigerants were used as working fluids
under Earth’s gravity. It should be noting that referring to Ong
and Thome [7], the term ‘‘mini-channel’’ found in the literature is
loosely given for the flow phenomena that might take place at
the transition from macro-scale flow to micro-scale flow.