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author:

Yu, Chuanghui (Yu, Chuanghui.) [1] | Xu, Zhe (Xu, Zhe.) [2] | He, Shaofan (He, Shaofan.) [3] (Scholars:何少凡) | Feng, Chengcheng (Feng, Chengcheng.) [4] | Tian, Ye (Tian, Ye.) [5] | Jiang, Lei (Jiang, Lei.) [6]

Indexed by:

EI Scopus SCIE

Abstract:

Enhancing critical heat flux (CHF) and heat transfer coefficient (HTC) by promoting the nucleation, growth, and departure of boiling bubbles has drawn significant attention owing to its wide applications. However, in-depth understanding and comprehensive manipulation of under-liquid bubble dynamics from in situ microscale perspectives remain challenging. Herein, in situ observations and analyses of the microsized boiling bubbles of ultra-low surface tension fluorinated liquids (FLs) are conducted on the superaerophobic silicon surfaces with crisscross microchannels and selective nanowires. It is revealed that deep microchannels yet short nanowires enable ultrafast liquid spreading (<549.6 ms) and ultralow bubble adhesion (approximate to 1.1 N), while an appropriate spacing (240-600 mu m) between microchannels minimizes the bubble departure time (<20.6 ms) due to timely coalescence. By verifying the above bubble dynamics principles through the collaborative enhancement of CHF and HTC, an optimized structure (microchannel depth approximate to 52.9 m, microchannel spacing approximate to 362.9 mu m, nanowire length approximate to 0 nm) is obtained and further implemented onto the exposed Si surface of a commercial CPU chip. Cooled by phase-change of FLs, the average temperature of CPU maintains approximate to 64.9 degrees C even under extreme power loads (approximate to 130 W), far below than those in conventional air-cooling and water-cooling operations.

Keyword:

boiling heat transfer bubble dynamics micro-/nanostructure phase-change cooling superaerophobicity

Community:

  • [ 1 ] [Yu, Chuanghui]Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Bioinspired Mat & Interfacial Sci, Beijing 100190, Peoples R China
  • [ 2 ] [Xu, Zhe]Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Bioinspired Mat & Interfacial Sci, Beijing 100190, Peoples R China
  • [ 3 ] [Feng, Chengcheng]Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Bioinspired Mat & Interfacial Sci, Beijing 100190, Peoples R China
  • [ 4 ] [Tian, Ye]Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Bioinspired Mat & Interfacial Sci, Beijing 100190, Peoples R China
  • [ 5 ] [Jiang, Lei]Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Bioinspired Mat & Interfacial Sci, Beijing 100190, Peoples R China
  • [ 6 ] [Yu, Chuanghui]Univ Chinese Acad Sci, Beijing 100190, Peoples R China
  • [ 7 ] [Tian, Ye]Univ Chinese Acad Sci, Beijing 100190, Peoples R China
  • [ 8 ] [Jiang, Lei]Univ Chinese Acad Sci, Beijing 100190, Peoples R China
  • [ 9 ] [He, Shaofan]Fuzhou Univ, Coll Chem Engn, Fuzhou 350108, Peoples R China
  • [ 10 ] [Jiang, Lei]Univ Chinese Acad Sci, Sch Future Technol, Beijing 101407, Peoples R China

Reprint 's Address:

  • [Xu, Zhe]Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Bioinspired Mat & Interfacial Sci, Beijing 100190, Peoples R China;;[Jiang, Lei]Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Bioinspired Mat & Interfacial Sci, Beijing 100190, Peoples R China;;[Jiang, Lei]Univ Chinese Acad Sci, Beijing 100190, Peoples R China;;[Jiang, Lei]Univ Chinese Acad Sci, Sch Future Technol, Beijing 101407, Peoples R China;;

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Source :

ADVANCED FUNCTIONAL MATERIALS

ISSN: 1616-301X

Year: 2025

Issue: 19

Volume: 35

1 8 . 5 0 0

JCR@2023

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count: 3

SCOPUS Cited Count: 3

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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