Experimental Investigation on Silver-Graphene Hybrid Nanofluid Droplet Evaporation and Wetting Characteristics of its Nanostructured Droplet Residue

Research output: Conference Papers (RGC: 31A, 31B, 32, 33)32_Refereed conference paper (no ISBN/ISSN)Not applicablepeer-review

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Detail(s)

Original languageEnglish
Number of pages8
Publication statusPublished - Jul 2019

Conference

TitleASME-JSME-KSME 2019 Joint Fluids Engineering Conference (AJKFLUIDS2019)
LocationHyatt Regency
PlaceUnited States
CitySan Francisco
Period28 July - 1 August 2019

Abstract

Droplet evaporation is a complex phase change process with a wide range of cooling applications, such as spray cooling and dropwise hotspot cooling in microelectronics, to name a few. The hybrid nanofluid droplet evaporation and its residue effects on evaporation of the subsequent hybrid nanofluid droplet is investigated in this research. Silver-graphene (Ag-GNP) hybrid nanofluid exhibiting synergistic thermal properties is investigated and prepared by dispersing silver nanoparticles
along with graphene nanoplatelets in water at 0.1% volume fraction and with different mixing ratios, followed by ultrasonication. The evaporation rate and wetting characteristics of a 3 μl volume of Ag-GNP hybrid nanofluid droplet on a copper surface were studied using an optical tensiometer. Once dried, the nanoporous structure of the residue surface was examined using a scanning electron microscope, while the surface roughness was measured using an optical profiler. Experiments were continued to further investigate the evaporation rate and wetting effects of the subsequent Ag-GNP hybrid nanofluid droplet over the residue surface. The results showed improved wetting characteristics, with 88% reduction in initial static contact angle and 163-196% enhancement in evaporation rate of the subsequent Ag-GNP hybrid nanofluid droplets over the residue surfaces as compared to the copper surface.

Research Area(s)

  • Hybrid nanofluid, droplet evaporation, nanostructured surface, droplet residue

Bibliographic Note

Information for this record is supplemented by the author(s) concerned.

Citation Format(s)

Experimental Investigation on Silver-Graphene Hybrid Nanofluid Droplet Evaporation and Wetting Characteristics of its Nanostructured Droplet Residue. / Siddiqui, Farooq R.; Tso, Edwin C. Y.; Fu, Sau C.; Chao, Christopher Y. H.; Qiu, Huihe.

2019. Paper presented at ASME-JSME-KSME 2019 Joint Fluids Engineering Conference (AJKFLUIDS2019), San Francisco, United States.

Research output: Conference Papers (RGC: 31A, 31B, 32, 33)32_Refereed conference paper (no ISBN/ISSN)Not applicablepeer-review