TY - JOUR
TI - Boiling of saturated water on grooved surface
AU - Sathyabhama Alangar
JN - Thermal Science
PY - 2019
VL - 23
IS - 2
SP - 1095
EP - 1104
PT - Article
AB - The flow patterns and pool boiling heat transfer performance of rectangular  grooved surface immersed in saturated water were experimentally  investigated. The effect of the aspect ratio (groove depth/fin thickness) on  boiling performance was examined. The test surfaces were manufactured on a  copper block with a base diameter of 19 mm with four fin thickness (0.5 mm,  1mm, 1.5 mm and 2 mm) and three groove depths (1.0 mm, 2.0 mm and 3.0 mm).  All experiments were performed in the saturated state at atmospheric  pressure. A plain surface was used as the reference standard and compared  with the grooved surfaces. The photographic images showed different boiling  flow patterns among the test surfaces at various heat fluxes. The test  results indicated that closer and more number of grooves yielded a greater  flow resistance against the bubble/vapor lift-off along the groove wall. At  higher heat flux, numerous vapor mushrooms periodically appeared from the  perimeter of the grooves. The developed correlation for Nusselt number  predicts the experimental data with MAE of 7.42%.