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Steep rock slopes, especially the convex ones, are more likely to collapse than landslide. The real status of such a slope can not be reflected by the Factor of Safety (FOS) calculated by Limit Equilibrium method. Therefore, a method to judge failure modes of collapse is proposed based on the results of numerical simulation. Also, physical simulation is carried out to research the development of collapse...
In order to know about coke phenomena of 130t/h boiler with tangential firing, velocity and valves characteristics of primary and secondary air were measured. Fireworks test and numerical simulation were done at the condition of actual working and uniform air distribution, and the tangential circle diameter of actual working and uniform air distribution were obtained. The results show that the boiler...
In this paper, we develop a new way to seek the source for a dust storm event which affects the air quality based on the new idea of numerical simulation method taking consideration of the discontinuity of meteorological fields.
Navigation in meandering channels usually requires straightening the river. Cutoffs across the neck of long meander bends improve the alignment of the river, reduce sinuosity, and shorten the river length, thus increasing the channel slope. In the present paper, the planform evolution of a meandering channel with cutoff is simulated by a 3D mathematical model, in which turbulence flow, sediment transport...
Experimental and numerical studies were carried out to investigate the viscous hydrodynamic forces acting on a tanker model in oblique motion. Oblique towing tests with a KVLCC2 model were conducted in the towing tank of Shanghai Jiao Tong University(SJTU) in deep water. The lateral forces and yaw moments on the model at different drift angles were measured. The viscous flow around the tanker model...
A new evaluation index of flocculation effect - the vortex velocity gradient G' was introduced in this paper, on the basis of currently existing evaluation indexes of flocculation effect —turbulent kinetic energy k and effective energy consumption ε; then combined three indexes the CFD numerical simulation of lattice flocculent pond was conducted. The results indicate that the numerical calculation...
2D numerical simulations of some control valve were carried out based on RANS method by using FLUENT 6.3 software. The finite volume method, standard k-ε turbulence model and SIMPLE algorithm were applied in the calculations, the main factors of cavitaving flow in control valve was found out. According to the principle of throttle step-down, mutations in a high pressure drop to the pressure gradient...
Existing calculation theories for soil pressure are all based on the two-dimensioned transverse vertical pressure developed on the culvert of the centerline of the highway, and are not suitable to the actual condition. Three-dimension pressure was discussed in this paper, and according to indoor experiments, the various conditions of the soil pressure around the culvert are found out along the longitudinal...
Based on the large-span spatial structure of Ordos's airport terminal of the extension project, a set of construction process and key technology for large-span spatial steel structure was discussed in detail, including elementary assembly on ground, segmental hoisting, overhead unit connection and curvilinear accumulated sliding. A set of multi-stage construction analysis method was put forward. Through...
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