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Research On Dynamic Model Simulation Technology Of Sea Surface Natural Phenomena

Posted on:2020-11-20Degree:MasterType:Thesis
Country:ChinaCandidate:S S ZhaoFull Text:PDF
GTID:2480306047498484Subject:Computer Science and Technology
Abstract/Summary:PDF Full Text Request
This paper analyzes and studies the simulation technology of fog and rain in the marine environment and related physical factors.First of all,the simulation of marine scenes is a complex scene.For the dynamic simulation of sea surface weather,it is especially important to combine their physical characteristics in order to realize their authenticity.For the advection fog on the sea,it is mainly affected by wind,sea surface temperature and atmospheric humidity.In this paper,the parameters added in the fog effect simulation are refined,and the natural conditions that are essential for the formation,change and dissipation of fog are added.As a basic algorithm,the calculation formula of square fog combines the relationship between visibility calculation algorithm,potential field,wind field and temperature field in physics method to improve the existing sea fog simulation technology and obtain new and more realistic fog.Simulation model.???Secondly,the key point of simulation of rain in natural phenomena on the sea surface is the interaction of raindrops and various types of physical characteristics,the interaction between rain and environment,and the different rainfall predicted by cloud thickness in 3D rainy scenes.Aiming at the problem that the existing rain-line simulation methods do not consider the rainfall effect caused by uncertain wind factors,it is not suitable for natural phenomena.In this paper,based on the empirical formulas and the wind speed conversion relationship in Kaimal scheme,a rain line simulation algorithm with uncertain wind factors is proposed by combining the fluctuating wind spectrum algorithm and the rain field formula.Finally,the key point of the simulation of the collision between raindrops and sea surface is the simulation of the large deformation motion of raindrops splash.For the simulation of raindrops splash,because the large deformation motion simulated by using Eulerian perspective will involve complex engineering methods such as finite element method.In this paper,considering the collision characteristics between raindrops and water surface,the Lagrangian perspective is introduced to simulate the flow.SPH(Hydrodynamics)algorithm and level set method are used to simulate the collision between raindrops and water surface.
Keywords/Search Tags:Sea-fog simulation, Rain-line simulation, Raindrop-splash simulation, SPH algorithm, Pulsating wind spectrum
PDF Full Text Request
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