The nanocapillarity phenomenon involves ultralow frictional flow of water molecules through nanoscale channels, and here we study this using exceptionally large number of nanochannels within graphene oxide (GO) laminates. The nanoconfined water molecules in GO nanochannels form square lattice (as in the ice bilayer), which melts and jumps across the channels, similar to slip flow, with mean speed of the order of 1 m/s. This ease of liquid spreading in GO laminate is used to delay the critical heat flux (CHF) phenomenon in water pool boiling, by preventing formation/growth of dry spots. The water nanocapillarity speed is derived based on the measured water penetration flux, and the CHF enhancement (up to 140%) is demonstrated on a 1-μm-thick GO laminate. The GO laminate offers efficient surface modifications for increased transport efficiency (and safety margin) of pool boiling heat transfer systems.
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Research-Article
Nanocapillarity in Graphene Oxide Laminate and Its Effect on Critical Heat Flux
Ji Min Kim,
Ji Min Kim
Division of Advanced Nuclear Engineering,
POSTECH,
San 31, Hyoja-dong, Nam-gu,
Pohang 37673, Kyungbuk, South Korea
e-mail: erskarin@postech.ac.kr
POSTECH,
San 31, Hyoja-dong, Nam-gu,
Pohang 37673, Kyungbuk, South Korea
e-mail: erskarin@postech.ac.kr
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Ji Hoon Kim,
Ji Hoon Kim
Department of Mechanical Engineering,
Incheon National University,
Songdo 1(il)-dong, Yeonsu-gu,
Incheon 22012, South Korea
e-mail: Kimjiihoon123@inu.ac.kr
Incheon National University,
Songdo 1(il)-dong, Yeonsu-gu,
Incheon 22012, South Korea
e-mail: Kimjiihoon123@inu.ac.kr
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Moo Hwan Kim,
Moo Hwan Kim
Division of Advanced Nuclear Engineering,
POSTECH,
San 31, Hyoja-dong, Nam-gu,
Pohang 37673, Kyungbuk, South Korea
e-mail: mhkim@postech.ac.kr
POSTECH,
San 31, Hyoja-dong, Nam-gu,
Pohang 37673, Kyungbuk, South Korea
e-mail: mhkim@postech.ac.kr
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Massoud Kaviany,
Massoud Kaviany
Department of Mechanical Engineering,
University of Michigan,
Ann Arbor, MI 48109
e-mail: kaviany@umich.edu
University of Michigan,
Ann Arbor, MI 48109
e-mail: kaviany@umich.edu
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Ho Seon Ahn
Ho Seon Ahn
Department of Mechanical Engineering,
Incheon National University,
Songdo 1(il)-dong, Yeonsu-gu,
Incheon 22012, South Korea
e-mail: hsahn@inu.ac.kr
Incheon National University,
Songdo 1(il)-dong, Yeonsu-gu,
Incheon 22012, South Korea
e-mail: hsahn@inu.ac.kr
Search for other works by this author on:
Ji Min Kim
Division of Advanced Nuclear Engineering,
POSTECH,
San 31, Hyoja-dong, Nam-gu,
Pohang 37673, Kyungbuk, South Korea
e-mail: erskarin@postech.ac.kr
POSTECH,
San 31, Hyoja-dong, Nam-gu,
Pohang 37673, Kyungbuk, South Korea
e-mail: erskarin@postech.ac.kr
Ji Hoon Kim
Department of Mechanical Engineering,
Incheon National University,
Songdo 1(il)-dong, Yeonsu-gu,
Incheon 22012, South Korea
e-mail: Kimjiihoon123@inu.ac.kr
Incheon National University,
Songdo 1(il)-dong, Yeonsu-gu,
Incheon 22012, South Korea
e-mail: Kimjiihoon123@inu.ac.kr
Moo Hwan Kim
Division of Advanced Nuclear Engineering,
POSTECH,
San 31, Hyoja-dong, Nam-gu,
Pohang 37673, Kyungbuk, South Korea
e-mail: mhkim@postech.ac.kr
POSTECH,
San 31, Hyoja-dong, Nam-gu,
Pohang 37673, Kyungbuk, South Korea
e-mail: mhkim@postech.ac.kr
Massoud Kaviany
Department of Mechanical Engineering,
University of Michigan,
Ann Arbor, MI 48109
e-mail: kaviany@umich.edu
University of Michigan,
Ann Arbor, MI 48109
e-mail: kaviany@umich.edu
Ho Seon Ahn
Department of Mechanical Engineering,
Incheon National University,
Songdo 1(il)-dong, Yeonsu-gu,
Incheon 22012, South Korea
e-mail: hsahn@inu.ac.kr
Incheon National University,
Songdo 1(il)-dong, Yeonsu-gu,
Incheon 22012, South Korea
e-mail: hsahn@inu.ac.kr
1Corresponding author.
Manuscript received August 19, 2016; final manuscript received March 9, 2017; published online April 25, 2017. Assoc. Editor: Ronggui Yang.
J. Heat Transfer. Aug 2017, 139(8): 082402 (9 pages)
Published Online: April 25, 2017
Article history
Received:
August 19, 2016
Revised:
March 9, 2017
Citation
Kim, J. M., Kim, J. H., Kim, M. H., Kaviany, M., and Ahn, H. S. (April 25, 2017). "Nanocapillarity in Graphene Oxide Laminate and Its Effect on Critical Heat Flux." ASME. J. Heat Transfer. August 2017; 139(8): 082402. https://doi.org/10.1115/1.4036282
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