| Title |
Fundamental Study on Heat Transfer Enhancement Effect of Microscale Surface Wrinkles |
| Authors |
박희진(Hee-Jin Park) ; 박상후(Sang-Hu Park) |
| DOI |
http://dx.doi.org/10.6110/KJACR.2014.26.9.447 |
| Keywords |
표면주름 ; 열전달 촉진기술 ; 전산유체역학이중구조 Surface wrinkles ; Heat transfer enhancement ; CFD ; Hierarchical structure |
| Abstract |
We evaluated heat transfer characteristics of microscale wrinkles using a CFD (computational fluid dynamics) analysis. In order to verify the heat transfer effect of wrinkles having various shapes, we introduce wrinkling processes to generate few different shapes of wrinkles such as macroscale (200∼400 μm width), microscale (10∼30 μm width), and hierarchical (microscale on macroscale wrinkle) wrinkles, using repetitive-dividing-volume (RDV) method for single-shape of wrinkles and connected method of UV-weakly polymerization with thermal curing for hierarchical structure of winkles. The analysis results of simplified CFD model showed that heat flux on heated plate was changed by the shape of wrinkles on the plate. The increase in heat flux of about 2.6 times was achieved in the case where hierarchical wrinkle structure was used. |