the spray characteristics of the fuel greatly influence emissions from diesel engines. spray development plays a vital role in improving the combustion and emission characteristics of fuel because it directly affects the air- fuel mixture formation. the spray characteristics of fuel mainly depend on fuel injection process, fuel density, fuel viscosity, ambient pressure and temperature. among th...

The hydrodynamic performance of the box-girder superstructure under extreme random wave conditions in actual ocean environment is focus coastal bridge designers and researchers. This paper proposed an analytical method to estimate forces on based potential flow theory correction parameters. accuracy validated by classical problem about force rectangular structure, empirical methods previous res...

This study offers a semi-analytical means to compute the wall pressure spectra beneath turbulent boundary layer depending only on latter’s Kármán number and dimensionless gradient. By inclusion of total mean shear profiles in mixing length model, velocity can be reconstructed under adverse, zero- favourable gradients. These serve as input existing models thus remove need for experimental or num...

In the present approach, a two-dimensional steady MHD free convection flow and mass transfer over a stretching sheet has been analyzed numerically including the Dufour and Soret effects with a magnetic field. The governing differential equations of the problem have been transformed into a system of non-dimensional differential equations, which are then solved numerically using a sixth-order Run...

We investigate the proton-boron nuclear fusion cross sections under influence of intense linearly polarized monochromatic laser fields with high frequency. First, we rewrite time-dependent Schr\"{o}dinger equation using Kramers-Henneberger (KH) transformation which allows for shifting all time dependence problem into potential function. Then, that satisfy frequency limit, time-averaged scheme i...

A divide and conquer algorithm is presented for computing arbitrary multi-dimensional discrete Fourier transforms. In contrast to standard approaches such as the row-column algorithm, this algorithm allows an arbitrary decomposition, based solely on the size of the transform independent of the dimension of the transform. Only minor modifications are required to compute transforms with different...

In this research, the numerical method of computational fluid dynamics and dimensionless parameter of Froude number have been applied to determine the flow regime over ogee spillways.Froude number is a dimensionless dynamic parameter calculated using the square root of the ratio of inertia force and gravitational force. Considering that the study of the regimes of flow over hydraulic structures...

The scaling properties of the continuous flowing layer in a quasi-2D circular tumbler half filled with a granular material are studied experimentally in the presence of three different interstitial fluids (air, water, and glycerine). In the dry case, the dimensionless flowing layer thickness δ(0)/d scales with the dimensionless flow rate Q(dry)(*) = Q/(dsqrt[gd]), where Q is the flow rate, d is...

Catalytic partial oxidation (CPOX) has recently received particular attention because it is one of the most attractive technologies for the production of syngas and hydrogen in small to medium scales. Current study subjected to partial oxidation reforming which have simultaneously studied the effect of the fuel composition and flow rates of methane-oxygen mixed gas on the SOFCs performances. In...

A new set of higher-order analytic solutions is introduced for the critical cases of: (a) ballistic skip trajectories with initial speed greater than the circular orbital speed (supercircular case); (b) shallow ballistic entry with entry speed less than the circular orbital speed (subcircular case); and (c) shallow ballistic entry from low circular orbits (circular case). Both non-circular case...