Regarding the importance of ring spinning method among spinning systems, great potentials exist for research about on the improvement of the quality and properties of ring spun yarn. This study aims to improve yarn quality by changing the shape and dimensions of spinning triangle through forming a groove in the middle zone of the front darfting &#10roller with a curvature of 5 to 7 mm. For the ...

Metal spinning as a kind of manufacturing process has capability to shape hollow components. In present work shear spinning process is used to formplates into conical shapes. Moreover, the aim of this research is to demonstrate the impact of the process parameters (i.e. feeding rate and spindle speed) on wall thickness. This approachwas done by experimental and finite elements method. The resul...

The Fermi and Swift satellites, together with ground based Cherenkov telescopes, has greatly improved our knowledge of blazars, namely Flat Spectrum Radio Quasars and BL Lac objects, since all but the most powerful emit most of their electro–magnetic output at γ–ray energies, while the very powerful blazars emit mostly in the hard X–ray region of the spectrum. Often they show coordinated variab...

We present general relativistic magneto-hydrodynamical simulations of equal-mass spinning black hole binary mergers embedded in a magnetized gas cloud. focus on the effect spin orientation relative to orbital angular momentum flow dynamics, mass accretion rate and Poynting luminosity. find that, across inspiral, accreting onto individual holes concentrates into disk-like overdensities, whose mo...

The surface profile of the film formed by spin coating is experimentally investigated in this paper. unavoidable wavy form at was observed when ultraviolet curable resin used. In addition, thickness variation directly related to viscosity, disk rotation speed, and size. Fluid dynamic theory with non-dimensional analysis conducted describe after process. It found that had been thickened until vi...

The micromixing efficiency in the rotor–stator spinning disk reactor is studied for increasing injection flow rates of limiting reagent. Using both Villermaux–Dushman method and second Bourne reaction, an increase segregation index was found with rate. Mechanistic models describing micro- mesomixing were reviewed implemented to describe effects A simplified turbulent-dispersion model this trend...