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Supercapillary Architecture‐Activated Two‐Phase Boundary Layer Structures for Highly Stable and Efficient Flow Boiling Heat Transfer
Author(s) -
Li Wenming,
Wang Zuankai,
Yang Fanghao,
Alam Tamanna,
Jiang Mengnan,
Qu Xiaopeng,
Kong Fengyu,
Khan Ahmed Shehab,
Liu Minjie,
Alwazzan Mohammad,
Tong Yan,
Li Chen
Publication year - 2020
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201905117
Subject(s) - boiling , materials science , heat transfer , nucleate boiling , boundary layer , critical heat flux , thermodynamics , heat flux , heat transfer coefficient , mechanics , evaporation , flow (mathematics) , physics
Development of smaller, faster, and more powerful electronic devices requires effective cooling strategies to efficiently remove ever‐greater heat. Phase‐change heat transfer such as boiling and evaporation has been widely exploited in various water‐energy industries owing to its efficient heat transfer mode. Despite extensive progress, it remains challenging to achieve the physical limit of flow boiling due to highly transitional and chaotic nature of multiphase flows as well as unfavorable boundary layer structures. Herein, a new strategy that promises to approach the physical limit of flow boiling heat transfer is reported. The flow boiling device with multiple channels is characterized with the design of micropinfin fences, which fundamentally transforms the boundary layer structures and imparts significantly higher heat transfer coefficient even at high heat flux conditions, in which boiling heat transfer is usually deteriorated due to the development of dryout starting from outlet regions and severe two‐phase flow instabilities. Moreover, the approaching of physical limit is achieved without elevating pressure drop.