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Prediction Model Of Oil Spill Diffusion In Deep Sea

Posted on:2019-03-21Degree:MasterType:Thesis
Country:ChinaCandidate:Q ChenFull Text:PDF
GTID:2382330593951791Subject:Naval Architecture and Marine Engineering
Abstract/Summary:PDF Full Text Request
The oil spill diffusion prediction model based on mathematical model and discrete phase model is studied,and the oil spill diffusion law based on two prediction models is studied in detail.The final diameter and the end time of the oil film increase with the increase of the leakage.When the leakage is large,the oil film scale calculated by the oil particle model is less than that calculated by the oil film expansion model at the beginning of the oil spill.In this paper,the " two-stage" method is used to improve the oil particle model,and the sensitivity of oil film scale to leakage is better than before.According to the discrete phase model,the prediction model of continuous oil spill diffusion on the sea surface is established,and the sensitivity of various environmental factors is studied.The results show that the flow velocity,the direction of water flow and the turbulent intensity have great influence on the oil spill diffusion.The flow velocity mainly affects the diffusion distance and the diffusion area of the oil spill.The flow direction mainly controls the migration and diffusion of oil particles,and the direction of oil spill changes greatly as the direction of flow changes.The turbulent intensity mainly affects the vertical dispersion and dispersion of oil particles.In this paper,the applicability and reliability of the two oil spill prediction methods are verified by calculation,and a solution based on the commercial software fluent is provided for the continuous oil spill diffusion in the sea.In view of the complexity of the existing oil spill prediction research methods,this paper focuses on the visualization oil spill forecasting system,and analyzes the architecture design and function of the system.Considering the practical application problems of the project,this paper simulated the tidal wave system in the Bohai sea based on the topography,boundary conditions,2d tide wave control equations of the Bohai sea,and the finite difference method.The visualization forecasting system of tide and tidal current is studied to provide reliable marine environmental data,and the prediction model is used in the system to simulate the beheavior of spilled oil.This system is easy to use,and has clear operating interface,which greatly simplifies the work of prediction.
Keywords/Search Tags:Oil spill diffusion, DPM model, Buoyant jet, Random walk method, Fluent
PDF Full Text Request
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