Preliminary note This paper deals with the numerical analysis procedure and results of flow simulation through solar chimney. Because of relatively low Reynolds numbers, some aerodynamic improvements could be obtained. The paper links input heat energy with geometry or air flow parameters. Basic solar chimney geometry is carried out and analyzed with CFD application in three dimensional domain....

We provide a theoretical foundation for the statistical approach for computing the absorption properties of particles in the Rayleigh domain. We present a general method based on the Discrete Dipole Approximation (DDA) to compute the absorption and scattering properties of particles in the Rayleigh domain. The method allows to separate the geometrical aspects of a particle from its material pro...

To investigate influence of welding parameters on weld bead geometry in underwater wet flux cored arc welding (FCAW), orthogonal experiments of underwater wet FCAW were conducted in the hyperbaric chamber at water depth from 0.2 m to 60 m and mathematical models were developed by multiple curvilinear regression method from the experimental data. Sensitivity analysis was then performed to predic...

Based on the differential transformation method, a semi-analytical solution is developed for free vibration and modal stress analyses of variable thickness two-directional functionally graded circular plates with restrained edges, resting on elastic foundations. Variations of the material and geometry parameters are monitored by five distinct exponential functions. The presented non-dimensional...

We study the statistical properties of the scattering matrix associated with generic quantum graphs. The scattering matrix is the quantum analogue of the classical evolution operator on the graph. For the energy-averaged spectral form factor of the scattering matrix we have recently derived an exact combinatorial expression. It is based on a sum over families of periodic orbits which so far cou...

Stainless steel (SS316L) is applied in numerous fields due to its intrinsic properties. In this study, micro-dimples were fabricated on SS316L. The effects of laser process parameters, such as frequency, average power, and pulse duration, the dimple diameter, distance, depth studied using an L9 orthogonal array. analysis variance (ANOVA) multi-objective optimization technique, principal-compone...

1. I N T R O D U C T I O N Rational parametrization of curves and surfaces is a very interesting problem in mathematics. For curves, it is shown that a curve of genus zero is a rational by Noether. As for surfaces, there is Noether 's theorem that an algebraic surface S is rational if and only if it contains an irreducible rational curve C with dim ICI >1. Although there exist some techniques t...

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HRSC image 0037, on the basis of analysis of which a schematic geologic map has been made. I to IV – zones, 1 to 4 – study areas each 8.9 x 27.9 km. Figure 2. Four study areas on southern slope of Olympus Mons with lava flows outlines. Fragments of HRSC image 0037. GEOMETRY AND FLOW PARAMETERS OF LAVAS OF OLYMPUS MONS VOLCANO: MARS. E. A. Bazilevskaya and G. Neukum, Geological Department, Mosco...