conducted the visualization of R-134a during flow
boiling in a tube with a diameter of 1.33 mm. Their test section was
made from a quartz glass tube coated externally by Indium Tin
Oxide (ITO) which was served as the resistive coating over which
a potential difference generated by a DC power supply was applied.
Their flow pattern data were also compared with the transition
lines by Triplett et al. [29],