Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1117/12.2218873 |
The Texas horned lizard as model for robust capillary structures for passive directional transport of cooling lubricants | |
Comanns, Philipp1; Winands, Kai2; Pothen, Mario2; Bott, Raya A.1; Wagne, Hermann1; Baumgartner, Werner3 | |
通讯作者 | Comanns, Philipp |
会议名称 | Conference on Bioinspiration, Biomimetics, and Bioreplication |
会议日期 | MAR 21-22, 2016 |
会议地点 | Las Vegas, NV |
英文摘要 | Moisture-harvesting lizards, such as the Texas horned lizard Phrynosoma cornutum, have remarkable adaptations for inhabiting arid regions. Special skin structures, in particular capillary channels in between imbricate overlapping scales, enable the lizard to collect water by capillarity and to transport it to the snout for ingestion. This fluid transport is passive and directional towards the lizard's snout. The directionality is based on geometric principles, namely on a periodic pattern of interconnected half-open capillary channels that narrow and widen. Following a biomimetic approach, these principles were transferred to technical prototype design and manufacturing. Capillary structures, 50 mu m to 300 mu m wide and approx. 70 mu m deep, were realized by use of a pulsed picosecond laser in hot working tool steel, hardened to 52 HRC. In order to achieve highest functionality, strategies were developed to minimize potential structural inaccuracies, which can occur at the bottom of the capillary structures caused by the laser process. Such inaccuracies are in the range of 10 mu m to 15 mu m and form sub-capillary structures with greater capillary forces than the main channels. Hence, an Acceleration Compensation Algorithm was developed for the laser process to minimize or even avoid these inaccuracies. The capillary design was also identified to have substantial influence; by a hexagonal capillary network of non-parallel capillaries potential influences of sub-capillaries on the functionality were reduced to realize a robust passive directional capillary transport. Such smart surface structures can lead to improvements of technical systems by decreasing energy consumption and increasing the resource efficiency. |
英文关键词 | biomimetic moisture harvesting fluid transport directional capillary transport surface structure lubrication laser surface structuring sky-writing burn-in effect |
来源出版物 | BIOINSPIRATION, BIOMIMETICS, AND BIOREPLICATION 2016 |
ISSN | 0277-786X |
EISSN | 1996-756X |
出版年 | 2016 |
卷号 | 9797 |
EISBN | 978-1-5106-0038-6 |
出版者 | SPIE-INT SOC OPTICAL ENGINEERING |
类型 | Proceedings Paper |
语种 | 英语 |
国家 | Germany;Austria |
收录类别 | CPCI-S |
WOS记录号 | WOS:000385792100025 |
WOS关键词 | MOLOCH-HORRIDUS ; WATER ; DYNAMICS |
WOS类目 | Biophysics ; Physics, Applied |
WOS研究方向 | Biophysics ; Physics |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/305435 |
作者单位 | 1.Rhein Westfal TH Aachen, Inst Biol 2, Worringerweg 3, D-52074 Aachen, Germany; 2.Fraunhofer Inst Prod Technol IPT, Steinbachstr 17, D-52074 Aachen, Germany; 3.Johannes Kepler Univ Linz, Inst Biomed Mechatron, Altenbergerstr 69, A-4040 Linz, Austria |
推荐引用方式 GB/T 7714 | Comanns, Philipp,Winands, Kai,Pothen, Mario,et al. The Texas horned lizard as model for robust capillary structures for passive directional transport of cooling lubricants[C]:SPIE-INT SOC OPTICAL ENGINEERING,2016. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。