Abstract
This current paper presents the experimental investigation of pool boiling enhancement for surface structuring using wire electric discharge machine (WEDM) method in saturated water at atmospheric pressure. Further, the effects of 45° inclination, geometry dimensions, cross-sectional angle of fins (15°, 45° and 90°) and WEDM current which are used in fabrication surfaces on copper surface were examined. The experimental results showed that the heat dissipation increases with higher WEDM current, lower cross-sectional fin angle (CFA) and deeper channel. Sample # 9 with more depth and high CFA reached a maximum heat flux of 120 W cm−2 which corresponds to an enhancement of 200% in heat transfer coefficient compared to the plain surface. The improved heat transfer is attributed to bubble dynamics, heat transfer area, bubble slide and scrape, and capillary flow.
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