Superwicking Functionality of Femtosecond Laser Textured Aluminum at High Temperatures
| Autor: | Lianrui Deng, Anatoliy Y. Vorobyev, Ranran Fang, Valeriy Maisotsenko, Wensheng Yan, Rui Li, Chunhong Lai, Xianhang Zhang, Zhonglin Pan, Chen Yang, Jiangen Zheng |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
capillarity flow dynamics
Materials science Capillary action General Chemical Engineering femtosecond laser processing Evaporation global climate change Maisotsenko cycle Atmospheric temperature range Microstructure laser-induced periodic surface structures (LIPSS) Article wicking materials Boiling point Chemistry Boiling aluminum Nano Femtosecond nanostructures microstructures cooling of electronics General Materials Science Composite material QD1-999 |
| Zdroj: | Nanomaterials Volume 11 Issue 11 Nanomaterials, Vol 11, Iss 2964, p 2964 (2021) |
| ISSN: | 2079-4991 |
| DOI: | 10.3390/nano11112964 |
| Popis: | An advanced superwicking aluminum material based on a microgroove surface structure textured with both laser-induced periodic surface structures and fine microholes was produced by direct femtosecond laser nano/microstructuring technology. The created material demonstrates excellent wicking performance in a temperature range of 23 to 120 °C. The experiments on wicking dynamics show a record-high velocity of water spreading that achieves about 450 mm/s at 23 °C and 320 mm/s at 120 °C when the spreading water undergoes intensive boiling. The lifetime of classic Washburn capillary flow dynamics shortens as the temperature increases up to 80 °C. The effects of evaporation and boiling on water spreading become significant above 80 °C, resulting in vanishing of Washburn’s dynamics. Both the inertial and visco-inertial flow regimes are insignificantly affected by evaporation at temperatures below the boiling point of water. The boiling effect on the inertial regime is small at 120 °C however, its effect on the visco-inertial regime is essential. The created material with effective wicking performance under water boiling conditions can find applications in Maisotsenko cycle (M-cycle) high-temperature heat/mass exchangers for enhancing power generation efficiency that is an important factor in reducing CO2 emissions and mitigation of the global climate change. |
| Databáze: | OpenAIRE |
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