Experimental investigation of vapor bubble growth during flow boiling in a microchannel

► An elongating bubble suppressed the growth of a neighboring bubble by as much as 50%. ► An upstream progression of the Onset of Bubble Elongation began at the channel exit and progressed upstream. ► The amplitude of local surface temperature oscillation increased with heat flux for stable flow boiling. ► The amplitude of local surface temperature oscillation decreased with heat flux for unstable flow boiling.