The sustainability index, waste energy ratio and improvement potential of a staggered air jet impingement on the spherical protrusions roughened absorber plate were derived for present study to evaluate exergy losses irreversibility in system. experimental analysis was carried out selected parameters: relative streamwise pitch, spanwise pitch diameter hydraulic ratio. flow Reynolds number range...

Abstract Modern manufacturers of tools for turning threads make them with a non-zero value the side rake angle cutting edge, which significantly increases their efficiency. The this is approximately equal to thread lead angle. However, today there lack theoretical research that would provide an algorithm calculating effect edge on one indicators accuracy - pitch diameter. Its particularly notic...

We describe how twist could play an essential role in stabilizing 20 nm diameter sickle hemoglobin fibers. Our theory successfully reproduces the observed variation of helical pitch length with fiber diameter. With no remaining adjustable parameters it also yields a prediction for the torsional rigidity of sickle hemoglobin fibers that is in good agreement with experiment and hence retains the ...

in this research, the steady-state flow filed around a 3d body and rotor configuration of the robin helicopter is simulated. the rotor is modeled by an actuator disk. for this purpose, an annular computational domain replaces the rotor and some modeled source terms are added to the momentum equations. this modeling of rotor considerably speed up computational time. the flow field over this heli...

We investigate experimentally the influence of suspended particles on the transition to turbulence. The particles are monodisperse and neutrally buoyant with the liquid. The role of the particles on the transition depends upon both the pipe to particle diameter ratios and the concentration. For large pipe-to-particle diameter ratios the transition is delayed while it is lowered for small ratios...

Potentially low-cost continuous carbon fibers are produced from solvated mesophase pitch through a patented meltblowing process. The structural evolution and properties of the fibers are characterized by various analytical methods. The meltblown fibers are continuous fibers which are collected into a fibrous web form, and the diameter of the filaments is attenuated by the flow rate of air strea...

Cicada wings consist of nanopillar arrays with a pitch, diameter, and height few hundred nanometers. These show strong antibacterial performance owing to cell membrane damage caused by the physical interaction nanopillars. Polymer-based nanopillars are essential for various industrial applications. Herein, we present fabrication process polymer-based using facile thermal nanoimprint technique. ...

The experimental and numerical studies of thermo-hydraulic characteristics perforated wavy fin heat exchanger unperforated were conducted. Firstly, the two kinds fins studied under different air in?let velocity constant inlet temperature. results show that Nusselt number increases with Reynolds friction factor decreases number. Then, performance is numerically analyzed, simulation are in good a...

Irresistible Materials (IM) is developing novel resist systems based on the multi-trigger concept, which incorporates a dose dependent quenching-like behaviour. In this study, we present results that have been obtained using Multi Trigger Resists (MTR) by performing EUV exposures ASML NXE scanner at IMEC. The MTR negative tone high opacity crosslinking incorporating. Pitch 28nm dense patterns c...