Open Access System for Information Sharing

Login Library

 

Article
Cited 37 time in webofscience Cited 40 time in scopus
Metadata Downloads

Induced liquid-solid contact via micro/nano multiscale texture on a surface and its effect on the Leidenfrost temperature SCIE SCOPUS

Title
Induced liquid-solid contact via micro/nano multiscale texture on a surface and its effect on the Leidenfrost temperature
Authors
Lee, Gi CheolKang, Jun-youngPark, Hyun SunMoriyama, KiyofumiKim, Seol HaKim, Moo Hwan
Date Issued
2017-06
Publisher
ELSEVIER SCIENCE INC
Abstract
A significant increase in the Leidenfrost temperature (LFT) was observed on a micro/nano rnultiscale textured surface (MTS) compared with a polished surface (PS) and a micro rough surface (MRS). MTS was fabricated by anodic oxidation and has nano-scaled needles with micro roughness. It showed improved surface wetting characteristics (0 contact angle with liquid spreading). On the other hand, MRS was fabricated by mechanical polishing and it only has micro roughness. LFT on MTS and MRS increased by approximately 150 degrees C and 30 degrees C, respectively, compared with one for PS. The textures on each surface influenced the water droplet dynamics. The relationship between LFT and the dynamics of water droplet were studied by high-speed photography. The key phenomenon determining LFT was the rebound process of the droplet during a few milliseconds. On MRS and MTS, the rebound phenomenon of the droplet was disturbed by the surface-texture-induced liquid-solid contact even when the surface was initially at a high temperature over 300 degrees C. The precursor wetting front, observed only on MTS and the capillary wicking phenomenon are likely the responsible mechanisms that significantly increased LFT on MTS. (C) 2017 Elsevier Inc. All rights reserved.
Keywords
HEAT-TRANSFER; WATER; NANOFLUIDS; DROPLETS; WETTABILITY; EVAPORATION; ALUMINA; ANGLES; POINT; FLUX
URI
https://oasis.postech.ac.kr/handle/2014.oak/50889
DOI
10.1016/j.expthermflusci.2017.01.022
ISSN
0894-1777
Article Type
Article
Citation
EXPERIMENTAL THERMAL AND FLUID SCIENCE, vol. 84, page. 156 - 164, 2017-06
Files in This Item:
There are no files associated with this item.

qr_code

  • mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Views & Downloads

Browse