Hollow carbon nanofibers (HCNFs) were prepared by electrospinning method with several coaxial nozzles, in which the level of the inner nozzle-end is adjustable. Core/shell nanofibers were prepared from poly(methyl methacrylate) (PMMA) as a pyrolytic core and polyacrylonitrile (PAN) as a carbon shell with three types of normal (viz. inner and outer nozzle-ends are balanced in the same level), in...

Abrasive water jet machining (AWJM) is one of the non conventional machining process for difficult to cut brittle, hard and thin materials. The process parameters which are mainly influence the quality of machining in AWJM are water pressure, stand-off distance, nozzle diameter, traverse speed, abrasive flow rate and abrasive size. This is an environment friendly and relatively inexpensive proc...

Performance of compression ignition engine is known to be spray characteristics related. Precise experimental information on fuel sprays is of utmost importance to model the fuel spray formation and its development in the engine combustion chamber. The previous experimental work of the present author on non-evaporating sprays produced by using a FIAT single-hole orifice type nozzle and a distri...

An improved bubble-electrospinning, consisting of a cone shaped air nozzle, a copper solution reservoir connected directly to the power generator, and a high speed rotating copper wire drum as a collector, was presented successfully to obtain high throughput preparation of aligned nanofibers. The influences of drum rotation speed on morphology and properties of obtained nanofibers were explored...

Cavitation and turbulence in a diesel injector nozzle has a great effect on the development and primary breakup of spray. However, the mechanism of the cavitation flow inside the nozzle and its influence on spray characteristics have not been clearly known yet because of the internal nozzle flow complexities. In this paper, a comprehensive numerical simulation is carried out to study the intern...

John R. Royer, Loreto Oyarte, Matthias E. Möbius, and Heinrich M. Jaeger The University of Chicago, Chicago, Illinois 60637, USA Received 30 July 2009; published online 27 October 2009 doi:10.1063/1.3211191 It is a common, well-known occurrence for a thin liquid stream to break up into droplets due to the surface tension of the liquid. Surprisingly, this effect can also occur in granular materi...

In order to predict the atomization characteristics of process zirconia dry granulation accurately, influence nozzle outlet diameter on is analyzed. The VOF method and RNG k-ε turbulence model are applied numerically analyze flow field pressure-swirl nozzles with different diameters granulation, effects spray cone angle, liquid film thickness, pressure distribution velocity result shows that wh...