@inproceedings{86d2b7c78eab4cf989b552704a43daf0,
title = "Experimental investigation on silver-graphene hybrid nanofluid droplet evaporation and wetting characteristics of its nanostructured droplet residue",
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 ultra-sonication. 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.",
keywords = "Droplet evaporation, Droplet residue, Hybrid nanofluid, Nanostructured surface",
author = "Siddiqui, {Farooq R.} and Tso, {Edwin C.Y.} and Fu, {Sau C.} and Chao, {Christopher Y.H.} and Huihe Qiu",
note = "Funding Information: The funding for this research is provided by the Hong Kong Research Grant Council via Collaborative Research Fund (CRF) account no. C6022-16G; General Research Fund (GRF) account no. 16202517 and 16206918. Publisher Copyright: Copyright {\textcopyright} 2019 ASME.; ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference, AJKFluids 2019 ; Conference date: 28-07-2019 Through 01-08-2019",
year = "2019",
doi = "10.1115/AJKFluids2019-5049",
language = "English",
series = "ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference, AJKFluids 2019",
publisher = "American Society of Mechanical Engineers(ASME)",
booktitle = "Fluid Measurement and Instrumentation; Micro and Nano Fluid Dynamics",
address = "United States",
}