DOI QR코드

DOI QR Code

Characteristics for Nanofluid Droplet Evaporation on Heated Surface at Boiling Temperature of Base Liquid

비등점의 가열 표면에서 나노유체 액적의 증발 특성

  • Received : 2015.11.01
  • Accepted : 2015.11.28
  • Published : 2015.12.31

Abstract

This study aims to experimentally investigate the evaporation characteristics of nanofluid droplet on heated surface at boiling temperature of DI-water. In particular, textured surface was used to examine the effect of wettability on evaporation. At the initial stage of evaporation process, dynamic contact angle (DCA) of nanofluid droplet with 0.01 vol.% concentration on textured surface rapidly increased over its equilibrium contact angle by generated large bubble inside the droplet due to lower wettability. However, contact angle of nanofluid droplet with higher concentration on textured surface decreased with surface tension. In addition, total evaporation time of droplet on textured surface was considerably delayed due to reduction of contact area between droplet and solid surface. Thus, evaporation characteristics were highly affected by the nanofluid concentration and surface wettability.

Keywords

Nanofluid;Droplet;Evaporation;Heated surface;Boiling temperature

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Cited by

  1. Dynamic wetting and heat transfer characteristics of a liquid droplet impinging on heated textured surfaces vol.97, 2016, https://doi.org/10.1016/j.ijheatmasstransfer.2016.02.041

Acknowledgement

Supported by : 한국연구재단