Browse > Article
http://dx.doi.org/10.6110/KJACR.2014.26.9.447

Fundamental Study on Heat Transfer Enhancement Effect of Microscale Surface Wrinkles  

Park, Hee-Jin (Graduate School of Mechanical Engineering, Pusan National University)
Park, Sang-Hu (School of Mechanical Engineering, ERC/NSDM, Pusan National)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.26, no.9, 2014 , pp. 447-452 More about this Journal
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 ($200{\sim}400{\mu}m$ width), microscale ($10{\sim}30{\mu}m$ 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.
Keywords
Surface wrinkles; Heat transfer enhancement; CFD; Hierarchical structure;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Persson, B. N. J., 2007, Wet adhesion with application to tree frog adhesive toe pads and tires, Journal of Physics : Condensed Matter, Vol. 19, No. 37, pp. 1-16.
2 Genzer, J. and Groenewol, J., 2006, Soft matter with hard skin : From skin wrinkles to templating and material characterization, Soft Matter, Vol. 2, No. 4, pp. 310-323.   DOI   ScienceOn
3 Chung, J. Y., Nolte, A. J., and Stafford, C. M., 2011, Surface wrinkling : a versatile platform for measuring thin-film properties, Advanced Materials, Vol. 23, No. 3, pp. 349-368.   DOI
4 Ding, W., Yang, Y., Zhao, Y., Jiang, S., Cao, Y., and Lu, C., 2013, Well-defined orthogonal surface wrinkles directed by the wrinkled boundary, Soft Matter, Vol. 9, No. 14, pp. 3720-3726.   DOI
5 Lin, P. C. and Yang, S., 2009, Mechanically switchable wetting on wrinkled elastomers with dual-scale roughness, Soft Matter, Vol. 5, No. 5, pp. 1011-1018.   DOI
6 Guvendiren, M., Yang, S., and Burdick, J. A., 2009, Swelling-induced surface patterns in hydrogels with gradient crosslinking density, Advanced Functional Materials, Vol. 19, No. 19, pp. 3038-3045.   DOI
7 Kim, S. J., Park, H. J., Lee, J. C., Park, S. H., Ireland, P., and Park, S. H., 2013, A simple method to generate hierarchical nanoscale structures on microwrinkles for hydrophobic applications, Materials Letters, Vol. 105, pp. 50-53.   DOI
8 Park, S. H., Park, H. J., Kim, S. J., and Ireland, P., 2013, Generation of periodic surface wrinkles using a single layer resin by a repetitive dividing volume(RDV) technique, Microelelctronic Engineering, Vol. 106, pp. 13-20.   DOI   ScienceOn
9 Yang, Z. and Shin, T. H., 1993, New time scale based k-epsilon model for near-wall turbulence, AIAA Journal, Vol. 31, No. 7, pp. 1191-1198.   DOI   ScienceOn
10 Park, S. H., Kim, S. J., Park, H. J., Lee, J. C., and Shin, B. S., 2013, Fabrication of high aspect ratio microscale polymer hairs having surface wrinkles, Polymer Korea, Vol. 37, No. 1, pp. 1-4.   과학기술학회마을   DOI
11 Yang, S., Khare, K., and Lin, P. C., 2010, Harnessing surface wrinkle patterns in soft matter, Advanced Functional Materials, Vol. 20, No. 16, pp. 2550-2564.   DOI
12 ANSYS, 2011, ANSYS CFX(release 13) User's manual, ANSYS Inc., Canonsburg, PA, U.S.A.
13 Ho, C. M. and Tai, Y. C., 1998, Micro-electro-mechanical systems(MEMS) and fluid flows, Annual Review of Fluid Mechanics, Vol. 30, pp. 579-612.   DOI   ScienceOn
14 Kareklas, K., Nettle, D., and Smulders, T. V., 2013, Water-induced finger wrinkles improve handling of wet objects, Biology Letters, Vol. 9, Article No. 20120999.
15 Hwang, S. D., Kwon, H. G., and Cho, H. H., 2010, Local heat transfer and thermal performance on periodically dimple-protrusion patterned walls for compact heat exchangers, Energy, Vol. 35, No. 12, pp. 5357- 5364.   DOI   ScienceOn