Boiling-favorable merits of nanowire arrays are discussed for the thermal stability of boiling heat transfer. Local and temporal heat transfer characteristics are evaluated on vertically aligned nanowire arrays using a devised temperature-array sensor. The effects of rough morphology and highly wetting characteristics of nanowires lead to the reliable heat transfer stability/uniformity as well as efficient heat dissipation performances in pool boiling environments. The easy re-wetting and by-productive cavity-like structures via long nanowires can stabilize nucleation dynamics that catalyzes bubble nucleation dispersely and detaches developed bubbles quickly. Nanowires-inspired boiling heat transfer can make a breakthrough in improvements of heat transfer uniformity/stability with spatial and temporal temperature variations less than 1.0 and 2.0 K, respectively. SiNWs can also guarantee enhancements of both heat dissipation capacity and efficiency by more than 100% compared to a plain surface.
|Number of pages||10|
|Journal||International Journal of Heat and Mass Transfer|
|Publication status||Published - 2014|
Bibliographical noteFunding Information:
This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2011-0017673 ) and the Human Resources Development program (No. 20134030200200 ) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade, Industry and Energy. The author B.S. Kim is grateful for a Seoul Science Fellowship provided by the Seoul Metropolitan Government.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanical Engineering
- Fluid Flow and Transfer Processes