NDLI: Modeling the Performance of Bi-Textured Micropillar Array as a Wicked Evaporator

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Modeling the Performance of Bi-Textured Micropillar Array as a Wicked Evaporator

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Azarkish, Hassan Behzadmehr, Amin Luc, G. Frechette
Copyright Year	2016
Abstract	In the present work, the performance of bi-textured micro pillar arrays has been modeled as a wicked evaporator to provide steam flow via the thin film evaporation mechanism. Bi-textured micro pillar evaporator consists of an array with rough hydrophilic pillar bases and smooth hydrophobic tips. Water wicks between the rough hydrophilic sections of the micro pillar array to cover the surface, and vaporizes from the thin films that are formed in the vicinity of the pillar walls. The stability of the phase change mechanism is increased due to the change in direction of the capillary forces at the rough-smooth interface of micro pillars. The experimental results show that the pure evaporation mechanism occurs for a surface temperature above saturation on the bi-textured micro pillar array. The numerical analysis shows that there are optimal micro pillar dimensions for each surface temperature. The evaporation mass flow rate at the optimum dimensions is higher than the pool boiling mass flow rate on a bare surface at the same surface temperature. However, the wicked evaporator performance decreases for larger evaporator sizes.
Sponsorship	Heat Transfer Division
File Format	PDF
ISBN	9780791850336
DOI	10.1115/HT2016-7366
Volume Number	Volume 2: Heat Transfer in Multiphase Systems; Gas Turbine Heat Transfer; Manufacturing and Materials Processing; Heat Transfer in Electronic Equipment; Heat and Mass Transfer in Biotechnology; Heat Transfer Under Extreme Conditions; Computational Heat Transfer; Heat Transfer Visualization Gallery; General Papers on Heat Transfer; Multiphase Flow and Heat Transfer; Transport Phenomena in Manufacturing and Materials Processing
Conference Proceedings	ASME 2016 Heat Transfer Summer Conference collocated with the ASME 2016 Fluids Engineering Division Summer Meeting and the ASME 2016 14th International Conference on Nanochannels, Microchannels, and Minichannels
Language	English
Publisher Date	2016-07-10
Publisher Place	Washington, DC, USA
Access Restriction	Subscribed
Subject Keyword	Water Temperature Stability Dimensions Surface roughness Evaporation Flow (dynamics) Modeling Thin films Numerical analysis Steam Pool boiling Columns (structural)
Content Type	Text
Resource Type	Article

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