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The commercial software CFD was used to solve problem by solving the Navier-Stokes equatlon with the k -ε model and VOF method. the author computed and simulated running resistance and flow field of a real amphibious vehicle, it proves that the simulation results of running resistance of a amphibious vehicle is accorded with the experimenial results and the frictional resistance coefficients of the...
The traveling state of submarine in water includes deep in water and near water-surface. Compared with the deep water submerged body, the flow field around a moving submerged body near the free surface is more complex, submerged body will suffer from wave-resistance. Uses ANSYS-ICEM software to build submarine model and computes it with CFX software. The resistance and wave pattern of a submarine...
In the paper, the 3-D multi-mathematical model COHERENS was adopted to simulate the transport and diffusion of concentrated brine into coastal waters. The concentrated brine discharged model was applied to Laizhou Bay. Three experiments on different combinations of temperature and salinity were designed. Based on the different diffusion situation of concentrated brine, it is found that the higher...
The flow field of a 1000 MW unit nuclear reactor pressure vessel operation process was numerically studied with realizable k-ε model. the reactor normal operating, circuit fault and isolation layer being plug conditions were studied. The different reactor flow characteristics between normal operating and two fault conditions were compared. The numerical simulation results show as follows, The core...
Three different plasticity index subgrade soils are selected from seasonal frozen soil region. Test specimens are made under the maximum degree of compaction with optimum moisture content. Static triaxial test is executed on the specimens under different confining pressures. The results show that with the same kind of soil, the shear strength increases with confining pressure; under the same confining...
The computational fluid simulation application Fluent is used for the thermal simulation of the internal recycle double skin facade of an office building in Chengdu to obtain the thermal insulation results of the model in summer and in winter; the effects of orientation on the thermal insulation results are analyzed and the measures to improve the thermal comfort of office rooms by increasing the...
This paper used the finite element simulation method, applied Schoenberg's fractured media theory into the simulation of two component wave field in the fractured media of coal seam, and simulated the single shot record in the three layers fractured media model. The simulation results indicate that when the coal-seam contains fracture, the single shot records will be affected visibly. The influences...
During the cause of expansion in turbines steam nucleates to become a two-phase mixture consisting of a very large number of extremely small droplets carried by the vapour. Turbine stages operating in a two-phase regime have a lower efficiency than those working on superheated steam and the turbine blades could be erosioned by the droplets. In order to investigated the influence of steam nucleation...
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