Figure 8
From: Enhanced condensation heat transfer using porous silica inverse opal coatings on copper tubes
Environmental SEM. The test sample was attached to a cold stage that was subcooled by 2 °C. Time-lapse images show that vapor condensed preferentially near cracks (t = 32 s and 44 s). When condensation continued, the condensate overflowed (t = 74 s) the porous structure. The condensate was transported through the cracks (t = 88 s) and the surface dried out (t = 92 s) when vapor supply was discontinued.
