scholarly journals Biomimetic “Cactus Spine” with Hierarchical Groove Structure for Efficient Fog Collection

2015 ◽  
Vol 2 (7) ◽  
pp. 1500047 ◽  
Author(s):  
Fan Bai ◽  
Juntao Wu ◽  
Guangming Gong ◽  
Lin Guo
Keyword(s):  
Fog Collection ◽  
Groove Structure

Laser induced forward transfer of high viscosity silver paste on double groove structure

2022 ◽  
Vol 148 ◽  
pp. 107795
Author(s):  
Yilin Shan ◽  
Xianmin Zhang ◽  
Gengchao Chen ◽  
Kai Li
Keyword(s):  
High Viscosity ◽  
Silver Paste ◽  
Forward Transfer ◽  
Groove Structure

Bioinspired Azimuthally Varying Nanoscale Cu Columns on Acupuncture Needles for Fog Collection

2021 ◽  
Vol 4 (9) ◽  
pp. 8733-8743
Author(s):  
Morteza Aliabadi ◽  
Afsaneh Zarkesh ◽  
Hossein Siampour ◽  
Sara Abbasian ◽  
Mohammadjavad Mahdavinejad ◽  
...  
Keyword(s):  
Fog Collection

Effect of surface “groove” structure of carbon nanotube bundles on the formation of nanohybrid shish kebab

2012 ◽  
Vol 27 (21) ◽  
pp. 2812-2818 ◽  
Author(s):  
Nanying Ning ◽  
Wei Zhang ◽  
Jiajie Yan ◽  
Fan Xu ◽  
Changyu Tang ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Nanotube Bundles ◽  
Groove Structure ◽  
Surface Groove ◽  
Image Position ◽  
Effect Of Surface

Abstract

Osteoblast Sensitivity to Topographical and Chemical Features of Titanium

2010 ◽  
Vol 638-642 ◽  
pp. 652-657 ◽  
Author(s):  
Barbara Nebe ◽  
Henrike Jesswein ◽  
Arne Weidmann ◽  
Birgit Finke ◽  
Regina Lange ◽  
...  
Keyword(s):  
Microwave Plasma ◽  
Bone Cells ◽  
Plasma Modification ◽  
Large Area ◽  
Chemical Surface ◽  
Modified Surfaces ◽  
Dependent Cell ◽  
Groove Structure ◽  
Positively Charged ◽  
Adhesion Component

The titanium-osteoblast-interaction can be influenced both by surface roughness and by chemical modifications. We have ascertained that a positively charged titanium surface boosts osteoblast cells adhesion due to their negatively charged cellular hyaluronan coat. In current experiments, chemical surface modifications were combined with different topographies. Titanium disks of technical purity were modified (i) in their roughness by polishing (P), machining (M) and corundum blasting (CB), and (ii) by subsequently chemical functionalization by a thin film (d≤0.1 µm) of microwave plasma polymerized allylamine (PPAAm). In addition, collagen I was immobilized on PPAAm via the bifunctional linker polyethylene glycol diacid or glutar dialdehyde, respectively. The cell shape and material's contact of human osteoblasts was analyzed by FE-SEM and time dependent cell adhesion measured by flow cytometry. The cell dynamic of the adhesion component vinculin was observed in living cells. Amino-functionalization (PPAAm) considerably enhances the adhesion of osteoblasts in combination with topographical features, which was in contrast to collagen modified surfaces. PPAAm allows the cells to literally melt into the groove structure of the titanium. The bone cells lie over a large area and very close to the surface, so that the edges of the cells can hardly be distinguished from the structure of the surface. The combinatory effect of topography and plasma modification could improve bonding of the implant to the bone tissue.

scholarly journals Fog collection and its relationship with local meteorological variables in a semiarid zone in Chile

Atmósfera ◽  
2018 ◽  
Vol 31 (2) ◽  
pp. 143-153 ◽  
Author(s):  
Sonia Montecinos ◽  
◽  
Pilar Cereceda ◽  
Daniela Rivera ◽  
◽  
...  
Keyword(s):  
Meteorological Variables ◽  
Semiarid Zone ◽  
Fog Collection

scholarly journals A Study of Drag Reduction on Cylinders with Different V-Groove Depths on the Surface

Water ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 36
Author(s):  
Jiyang Qi ◽  
Yue Qi ◽  
Qunyan Chen ◽  
Fei Yan
Keyword(s):  
Drag Reduction ◽  
Drag Coefficient ◽  
Vortex Structure ◽  
Lift Coefficient ◽  
Pressure Coefficient ◽  
Reynolds Numbers ◽  
Groove Surface ◽  
Smooth Cylinder ◽  
Groove Structure ◽  
Reduction Effect

In this study, the drag reduction effect is studied for a cylinder with different V-groove depths on its surface using a k-ω/SST (Shear Stress Transport) turbulence model of computational fluid dynamics (CFD), while a particle image velocimetry (PIV) system is employed to analyze the wake characteristics for a smooth cylinder and a cylinder with different V-groove depths on its surface at different Reynolds numbers. The study focuses on the characteristics of the different V-groove depths on lift coefficient, drag coefficient, the velocity distribution of flow field, pressure coefficient, vortex shedding, and vortex structure. In comparison with a smooth cylinder, the lift coefficient and drag coefficient can be reduced for a cylinder with different V-groove depths on its surface, and the maximum reduction rates of lift coefficient and drag coefficient are about 34.4% and 16%, respectively. Otherwise, the vortex structure presents a complete symmetry for the smooth cylinder, however, the symmetry of the vortex structure becomes insignificant for the V-shaped groove structure with different depths. This is also an important reason for the drag reduction effect of a cylinder with a V-groove surface.

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