Interfacial wicking dynamics and its impact on critical heat flux of boiling heat transfer

Beom Seok Kim, Hwanseong Lee, Sangwoo Shin, Geehong Choi, Hyung Hee Cho

Research output: Contribution to journalArticle

70 Citations (Scopus)

Abstract

Morphologically driven dynamic wickability is essential for determining the hydrodynamic status of solid-liquid interface. We demonstrate that the dynamic wicking can play an integral role in supplying and propagating liquid through the interface, and govern the critical heat flux (CHF) against surface dry-out during boiling heat transfer. For the quantitative control of wicking, we manipulate the characteristic lengths of hexagonally arranged nanopillars within sub-micron range through nanosphere lithography combined with top-down metal-assisted chemical etching. Strong hemi-wicking over the manipulated interface (i.e., wicking coefficients) of 1.28 mm/s0.5 leads to 164% improvement of CHF compared to no wicking. As a theoretical guideline, our wickability-CHF model can make a perfect agreement with improved CHF, which cannot be predicted by the classic models pertaining to just wettability and roughness effects, independently.

Original languageEnglish
Article number191601
JournalApplied Physics Letters
Volume105
Issue number19
DOIs
Publication statusPublished - 2014 Nov 10

Fingerprint

boiling
heat flux
heat transfer
supplying
liquid-solid interfaces
wettability
roughness
lithography
hydrodynamics
etching
coefficients
liquids
metals

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Kim, Beom Seok ; Lee, Hwanseong ; Shin, Sangwoo ; Choi, Geehong ; Cho, Hyung Hee. / Interfacial wicking dynamics and its impact on critical heat flux of boiling heat transfer. In: Applied Physics Letters. 2014 ; Vol. 105, No. 19.
@article{2fffed145185472e8606f6e9924572ef,
title = "Interfacial wicking dynamics and its impact on critical heat flux of boiling heat transfer",
abstract = "Morphologically driven dynamic wickability is essential for determining the hydrodynamic status of solid-liquid interface. We demonstrate that the dynamic wicking can play an integral role in supplying and propagating liquid through the interface, and govern the critical heat flux (CHF) against surface dry-out during boiling heat transfer. For the quantitative control of wicking, we manipulate the characteristic lengths of hexagonally arranged nanopillars within sub-micron range through nanosphere lithography combined with top-down metal-assisted chemical etching. Strong hemi-wicking over the manipulated interface (i.e., wicking coefficients) of 1.28 mm/s0.5 leads to 164{\%} improvement of CHF compared to no wicking. As a theoretical guideline, our wickability-CHF model can make a perfect agreement with improved CHF, which cannot be predicted by the classic models pertaining to just wettability and roughness effects, independently.",
author = "Kim, {Beom Seok} and Hwanseong Lee and Sangwoo Shin and Geehong Choi and Cho, {Hyung Hee}",
year = "2014",
month = "11",
day = "10",
doi = "10.1063/1.4901569",
language = "English",
volume = "105",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "19",

}

Interfacial wicking dynamics and its impact on critical heat flux of boiling heat transfer. / Kim, Beom Seok; Lee, Hwanseong; Shin, Sangwoo; Choi, Geehong; Cho, Hyung Hee.

In: Applied Physics Letters, Vol. 105, No. 19, 191601, 10.11.2014.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Interfacial wicking dynamics and its impact on critical heat flux of boiling heat transfer

AU - Kim, Beom Seok

AU - Lee, Hwanseong

AU - Shin, Sangwoo

AU - Choi, Geehong

AU - Cho, Hyung Hee

PY - 2014/11/10

Y1 - 2014/11/10

N2 - Morphologically driven dynamic wickability is essential for determining the hydrodynamic status of solid-liquid interface. We demonstrate that the dynamic wicking can play an integral role in supplying and propagating liquid through the interface, and govern the critical heat flux (CHF) against surface dry-out during boiling heat transfer. For the quantitative control of wicking, we manipulate the characteristic lengths of hexagonally arranged nanopillars within sub-micron range through nanosphere lithography combined with top-down metal-assisted chemical etching. Strong hemi-wicking over the manipulated interface (i.e., wicking coefficients) of 1.28 mm/s0.5 leads to 164% improvement of CHF compared to no wicking. As a theoretical guideline, our wickability-CHF model can make a perfect agreement with improved CHF, which cannot be predicted by the classic models pertaining to just wettability and roughness effects, independently.

AB - Morphologically driven dynamic wickability is essential for determining the hydrodynamic status of solid-liquid interface. We demonstrate that the dynamic wicking can play an integral role in supplying and propagating liquid through the interface, and govern the critical heat flux (CHF) against surface dry-out during boiling heat transfer. For the quantitative control of wicking, we manipulate the characteristic lengths of hexagonally arranged nanopillars within sub-micron range through nanosphere lithography combined with top-down metal-assisted chemical etching. Strong hemi-wicking over the manipulated interface (i.e., wicking coefficients) of 1.28 mm/s0.5 leads to 164% improvement of CHF compared to no wicking. As a theoretical guideline, our wickability-CHF model can make a perfect agreement with improved CHF, which cannot be predicted by the classic models pertaining to just wettability and roughness effects, independently.

UR - http://www.scopus.com/inward/record.url?scp=84922448164&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84922448164&partnerID=8YFLogxK

U2 - 10.1063/1.4901569

DO - 10.1063/1.4901569

M3 - Article

VL - 105

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 19

M1 - 191601

ER -