Open Access System for Information Sharing

Login Library

 

Article
Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

Leidenfrost temperature on porous wick surfaces: Decoupling the effects of the capillary wicking and thermal properties

Title
Leidenfrost temperature on porous wick surfaces: Decoupling the effects of the capillary wicking and thermal properties
Authors
Lee, G.C.Kim, S.H.Kang, J.-Y.Kim, M.H.Jo, H.
Date Issued
Dec-2019
Publisher
Elsevier Ltd
Abstract
The Leidenfrost temperature TLFP of falling water droplet was studied on sintered porous wick surfaces. Various surface factors were analyzed to identify those that significantly contribute to increasing the TLFP. To decouple the effects of capillary wicking on porous wick surfaces, the results obtained using ethanol as a working fluid were compared to the results obtained using water. When ethanol was used, the capillary wicking did not differ significantly between the porous wick surfaces. The evaporation time of the droplets was measured at high temperatures (100?600 ��C) to evaluate the TLFP. The effect of surface permeability on the absorption of the vapor layer through a porous wick surface had a negligible influence on the TLFP. Within the range of low thermal effusivity of the heating surface, an analysis of the interface temperature shows that in liquid ethanol, the thermal properties dominate the TLFP as well as the overall boiling regime. Similarly, in water (for which the capillary wicking effect cannot be ignored), the TLFP and film boiling regime were determined by the thermal effusivity. In both liquids, the thermal effusivity was the dominant determinant of the TLFP, regardless of the capillary wicking rate. However, the capillary wicking significantly affected the boiling heat transfer in water, until it reached the transition boiling regime. ? 2019
URI
http://oasis.postech.ac.kr/handle/2014.oak/100057
ISSN
0017-9310
Article Type
Article
Citation
International Journal of Heat and Mass Transfer, vol. 145, 2019-12
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

Researcher

 KIM, MOO HWAN
Div. of Advanced Nuclear Enginrg
Read more

Views & Downloads

Browse