In this note we study extra large spherical conemanifolds in dimension 2 (though many of our resultsz and techniques extend to higher dimensions. A 2-dimensional spherical cone manifold is a metric space where all but finitely many points has a neighborhood isometric to a neighborhood of a point on the round sphere S. The exceptional points (cone points) have neighboroods isometric to a spheric...

A 3-D CFD model based on KIVA 3 code is developed with a “reduced” detailed chemical kinetics of 291 elementary reaction steps with 79 chemical species for diesel fuel combustion. The model was validated by the corresponding experimental results and employed to examine some important parameters which have significant effects on the engine performance for an IDI diesel engine with a swirl chambe...

The objective of this study is taken to realize pesticide precision spray of fruit trees and the other crops and reduce the deposition losses outside the canopy when the real time sensing technology was used in the pesticide target spray. In this paper the Pesticide solution deposition distribution experiments were conducted with two different volume median diameter (VMD) hollow cone nozzles fi...

Abstract: Mathematical modeling of planing hulls and determination of their characteristics are the most important subjects in hydrodynamic study of planing vessels. In this paper, a new mathematical model has been developed based on pressure distribution. This model has been provided for two different situations: (1) for a situation in which all forces pass through the center of gravity and (2...

A computational study of partial cavitation over axisymmetric bodies is presented using two numerical methods. The first method is based on the VOF technique where transient 2D Navier-Stokes equations are solved along with an equation to track the cavity interface. Next, the steady boundary element method (BEM) based on potential flow theory is presented. The results of the two methods for a di...

Pressure swirl nozzles are widely applied in spray cooling, dust removal, and fuel injection. To better connect the nozzle structure with internal flow to analyze their influence on parameters, this paper designs a uses experimental measurement computational fluid dynamics simulation methods investigate of nozzle's tangential velocity axial ratio ( v τin / zin ) diversion channel eccentric dist...

Gelled fuels have promising applications in the aerospace field. Higher density and calorific value can be achieved with addition of energetic metal particles to gelled fuels, which also effectively improve combustion efficiency fuel thus enhance engine performance. However, make rheological properties more complex, introduces difficulties regarding their atomization combustion. In order invest...

We developed a modified paper spray ionization (PSI) platform, named as paper cone spray ionization (PCSI), for direct mass spectrometric analysis of raw solid samples. The major modification from conventional PSI was the geometry of the paper base: PCSI uses a triangular-pyramidal-shaped paper tip instead of a planar triangular-shaped one. This three-dimensional paper cone serves as a sample c...

The characterization of atomized spray in terms its structure, break-up, and droplet morphology is crucial to analyze an engine's performance. Therefore, this study, the characteristics boron-laden slurry fuels have been evaluated experimentally through a high-speed imaging technique. rheological properties boron-loaded measured their impact on atomization behavior has qualitatively analyzed. c...