Influence of Structure and Wettability of Porous Silver Surfaces on Enhancing Phase Change Heat Transfer

被引：0

作者：

Gouws, G. J. ^{[1
]}

Sherson, B. ^{[1
]}

Sinnathambi, A. ^{[1
]}

Babu, R. ^{[1
]}

Moore, C. P. ^{[1
]}

机构：

[1] Victoria Univ Wellington, Sch Engn & Comp Sci, POB 600, Wellington, New Zealand

来源：

PROCEEDINGS OF THE 17TH IEEE INTERSOCIETY CONFERENCE ON THERMAL AND THERMOMECHANICAL PHENOMENA IN ELECTRONIC SYSTEMS (ITHERM 2018) | 2018年

关键词：

freeze casting; pool boiling; evaporation; droplet; wettability; contact angle;

D O I：

暂无

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The influence of the surface wettability and microstructure of porous silver surface layers on heat transfer during pool boiling and the evaporation of sessile drops from these surfaces was studied. These porous films were prepared by a modified freeze casting process and the wettability was found to be strongly influenced by the mass loading of silver nanoparticles in the starting colloidal suspension. As- prepared films typically show superhydrophylic behavior, most likely due to polyvinyl alcohol (PVA) binder remaining in the structure. The removal of this PVA by a hot wash in DI water revealed the intrinsic wettability of the surfaces. Heat transfer during the nucleate stage of pool boiling was found to be most efficient on hydrophilic surfaces with high Ag loading. The evaporation of sessile droplets from hot surfaces was also favored by more hydrophilic surfaces. The long term stability of these surfaces still remain an issue.

引用

页码：134 / 140

页数：7

共 15 条

[1] Surface engineering for phase change heat transfer: A review [J].

Attinger D. ;

Frankiewicz C. ;

Betz A.R. ;

Schutzius T.M. ;

Ganguly R. ;

Das A. ;

Kim C.-J. ;

Megaridis C.M. .

MRS Energy & Sustainability, 2014, 1 (1)

[2] Anisotropic Microstructured Poly(Vinyl Alcohol) Tissue-Mimicking Phantoms [J].

Dawson, Andrew ;

Harris, Paul ;

Gouws, Gideon .

IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL, 2010, 57 (07) :1494-1496

[3] Freezing as a path to build complex composites [J].

Deville, S ;

Saiz, E ;

Nalla, RK ;

Tomsia, AP .

SCIENCE, 2006, 311 (5760) :515-518

[4] Freeze-Casting of Porous Biomaterials: Structure, Properties and Opportunities [J].

Deville, Sylvain .

MATERIALS, 2010, 3 (03) :1913-1927

[5] Microstructured silver surfaces produced by freeze casting for enhanced phase change heat transfer [J].

Gouws, G. J. ;

Shortt, N. .

15TH INTERNATIONAL CONFERENCE ON MICRO AND NANOTECHNOLOGY FOR POWER GENERATION AND ENERGY CONVERSION APPLICATIONS (POWERMEMS 2015), 2015, 660

[6] Poly(vinyl alcohol) scaffolds with tailored morphologies for drug delivery and controlled release [J].

Gutierrez, Maria C. ;

Garcia-Carvajal, Zaira Y. ;

Jobbagy, Matias ;

Rubio, Tausto ;

Yuste, Luis ;

Rojo, Fernando ;

Ferrer, Maria L. ;

del Monte, Francisco .

ADVANCED FUNCTIONAL MATERIALS, 2007, 17 (17) :3505-3513

[7] Review of boiling heat transfer enhancement on micro/nanostructured surfaces [J].

Kim, Dong Eok ;

Yu, Dong In ;

Jerng, Dong Wook ;

Kim, Moo Hwan ;

Ahn, Ho Seon .

EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2015, 66 :173-196

[8] Nanoscale Surface Modification Techniques for Pool Boiling EnhancementA Critical Review and Future Directions [J].

Lu, Yen-Wen ;

Kandlikar, Satish G. .

HEAT TRANSFER ENGINEERING, 2011, 32 (10) :827-842

[9] MATERIALS, FABRICATION, AND MANUFACTURING OF MICRO/NANOSTRUCTURED SURFACES FOR PHASE-CHANGE HEAT TRANSFER ENHANCEMENT [J].

McCarthy, Matthew ;

Gerasopoulos, Konstantinos ;

Maroo, Shalabh C. ;

Hart, A. John .

NANOSCALE AND MICROSCALE THERMOPHYSICAL ENGINEERING, 2014, 18 (03) :288-310

[10] Review of the Manufacturing Techniques for Porous Surfaces Used in Enhanced Pool Boiling [J].

Patil, Chinmay M. ;

Kandlikar, Satish G. .

HEAT TRANSFER ENGINEERING, 2014, 35 (10) :887-902

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