Numerical Simulation On Wave-making Characteristic Of A Prolate Spheroid Moving In Stratified Fluid

Stratified fluids are frequent phenomena in the atmosphere, outfall, lakes and oceans on account of the variation of water temperature and salinity with depth, which lead to the variation of density. When ship and submarine sail in the area with stratified fluids, some more complicated wave-making characteristic and hydrodynamics problems than in homogeneous water will arise. Generally speaking, When a surface or subsurface ship advances in such stratified fluids, not only surface waves but also internal waves can be generated.Since moving objects inspired by the issues raised after the wave in the stratified fluids , owing to its important applications in the defense and engineering background, governments and the military has been concerned. In recent years , Stratified fluid submersible lead free surface wave-making orientation has become a latent objective of this study to identify and concealed prospective study , with the academic and practical value.Reviewing and summarizing progress on the basis of the current study abroad , This paper utilize business software CFX on the numerical simulation of the wave-making of ellipsoid of the slender body in the stratified fluid. First dealing with a model, modeling software UG and griding software ICEM, calculator CFX are used to calculate. Then use CFX software, based on the VOF method , k-εtwo equation turbulence model using as a control equations are solved to simulate the slender ellipsoid in the stratified fluid movement in free surface and interface characteristics of the wave. The dependence of environmental parameters such as the depth of the fluids , the density ratio of the fluids , the velocity of the objects and etc. is also discussed. The qualitative analysis results show that Slender ellipsoid movement in wave-free surface and interface on the waveform characteristics mainly are decided by the slender body velocity and ellipsoid Supercritical fluid characteristics of the speed ; Slender ellipsoid location, the density ratio of the fluids Upper and lower for wave patterns are quite obvious; geometric features of the moving Slender ellipsoid on the free surface and the junction surface wave profile is not much, However, the amplitude has a certain impact. Meanwhile, literature and the results of numerical and experimental research, Simulation results of this paper is to be constituted or wave-making characteristics changes in the distribution of basic waveforms coincide with the literature.While this paper received the preliminary results , However, due to processing methods, such as the study of the conditions and restrictions of this study need to be further improved .Finally, the paper summarize experiences and the shortcomings of the process, use for reference from the follow-up researchers.