Abstract Super-hydrophobic textured surfaces reduce hydrodynamic drag in pressure-driven laminar flows micro-channels. However, despite the wide usage of non-Newtonian liquids microfluidic devices, flow behaviour such was rarely examined so far context friction reduction super-hydrophobic Thus, we have investigated influence topologically different rough on shear-thinning First, factor ratio (a...

Minimizing energy loss and improving system load capacity and compactness are important objectives for fluid power systems. Recent studies reveal that micro-textured surfaces can reduce friction in full-film lubrication, and that asymmetric textures can reduce friction and increase normal force simultaneously. As an extension of these previous discoveries, we explore how enhanced texture design...

Nowadays the surface texturing has been widely recognized as a usable capability to improve the tribological systems. In this paper, ultrasonic assisted turning (UAT) isperformed to create the micro textures on the flat faces. Micro surface texturing ismade on the Al7075-T6 by the UAT in the face turning process. Then, the influences of cutting speed feed, vibration direction and vibration ampl...

The surface properties of alloys can be improved by coating their surfaces and adding a micro-texture. effect on the alloy composite coatings textured has not been addressed in previous studies. In this study, micro-texture was added to WC+Co AlCrN/AlTiSiN coating. influence micro-texture’s geometric parameters its lifespan were studied detail. First, hardness phases various micro-textured anal...

Scalable and cost effective patterning of polymer structures and their surface textures is essential to engineer material properties such as liquid wetting and dry adhesion, and to design artificial biological interfaces. Further, fabrication of high-aspect-ratio microstructures often requires controlled deep-etching methods or high-intensity exposure. We demonstrate that carbon nanotube (CNT) ...

The lubrication performance of journal bearings with different sorts of uniformly distributed micro-spherical textures are studied in this paper. Geometries and dynamic models of journal bearings with pure concave/convex textures are developed. The validity of the proposed models is verified against the oil film pressure distribution from the literature. The effects of geometry parameters (the ...

A multiscale model that enables quantitative understanding and prediction of the size effect on the scattering properties of microand nanostructures is crucial for the design of light-emitting diode (LED) surface textures optimized for high light extraction efficiency (LEE). In this paper, a hybrid process for combining full-wave finite-difference time-domain simulation and a ray-tracing techni...