Inspired
by the natural fog collection of the Namib beetles and
desert cacti, a bioinspired design (BID) needle with a remarkable
wettability gradient is introduced. Previous studies about directional
water transport have rarely investigated wettability gradients along
the azimuthal direction of a needle. Here, we have reported on the
fast droplet transportation on a BID needle improved by azimuthally
varying Cu nanocolumns on a steel acupuncture needle. We have employed
glancing angle deposition (GLAD) to produce gradient porous Cu nanocolumns
directly on the curved surface of an acupuncture needle. Due to the
engineered gradient on such a surface, a high-speed fog collection
of V = 134.8 mm·s–1 and a
remarkable acceleration of a = 848.3 mm·s–2 were observed for the droplets on the needle surface.
All periodically created droplets were easily swept along the 40 mm
needle path in less than 0.5 s. Such efficient fog collection and
fast droplet transportation in the proposed azimuthally nonuniform
structure have many potential applications, from fog collection in
low water regions to water transportation in microsystems.
Geometry is one of the main features in formation of Persian architecture. Research in Persian architecture geometry is impossible without familiar with geometry. This research tries to demonstrate the relationship between the progress of Persian architecture, geometry and mathematics evolution. In this regard, seeks to address the following questions: What is the relationship between the progress of Persian architecture and geometry evolution? To this end first, a detailed survey is conducted on the Persian Architecture and Mathematicians in the pre-Islamic and Islamic History. The Persian empires and dynasties are analyzed and chronologically organized to determine the evolution of mathematics and geometry impacts on the formation and development of Persian architecture. The research hypothesis is that evolution of mathematics and geometry, have a direct impact on the formation and development of Iranian architecture. This study depicts by development of mathematic geometric, Persian architecture has progressed and With the Fading communication between mathematicians and architects, manufacturing techniques of buildings has deteriorated.
PurposeThis paper's main objective is to focus on the water-harvesting ability of plants and try to implement a solution-based method to outline a plant-inspired design framework.Design/methodology/approachThe current paper aims to provide a step-by-step approach to the biological-inspired design by looking deeply at plants' mechanisms and features to harvest water and conduct a method to learn them in an organized way.FindingsIn addition to the proposed framework, the fundamental water-harvesting principles of plants including increasing condensation, reducing transpiration and facilitating transportation have been extracted by investigating several adaptable plants. The relevant factors related to each of these three principles are introduced and can potentially ease the process of bio-inspiration as it contributes to the findability and understandability of a particular biologic strategy. As a result, this framework can be used to the formation of novel designs in different disciplines. In this process, the development of an architectural design concept is presented as an example.Originality/valueThe current global issue about the shortage of water leads researchers to learn adaptability from nature and increase the demands of using bio-inspired strategies. The novelty of this study is to introduce a water-harvesting design path, which has been presented using a four-step-plant-to-design process. Learning from plants' water-harvesting strategies will contribute to efficiency in different disciplines. The findings of this study have important implications for developing bio-inspired water-harvesting materials and systems. Moreover, the findings add substantially to the understanding of water-harvesting architecture and play an important role in bridging the gap between theory and practice.
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