基于SPH方法对自由表面流的数值模拟及可视化研究-水工结构 水工结构计算机应用专业论文.docxVIP

郑粥大学碗圭学位论文 郑粥大学碗圭学位论文 摘要 Abstract r111e flowing problem ofthe fluid that has free surface has a great deal ofexistence in the engineering，such as ocean engineering，petroleum chemical engineering,， hydraulic engineering and mechanical engineering．etc． For example Wave propagate，transform，break and interact with structures in ocean engineering： During the wind blow the lake surface，the pollutant diffuse in lake And the problem of crest overflow and the flow under the gate in hydraulic engineering．ere．111e falnol／B water conservancy studying organization of some developed countries have already from past with physical model experiment is main research means，gradual conversion for simulation to lay equal stress on with physical model by numerical or with numerical simulation is main research means．Such嬲the Delft hydraulics laboratory ofHolland and the Advanced Scientific Computing Ltd of Canada．etc．all obtain a better result in aspect of the numerical simulation and visualization of its 、 result．The flee surface flow because of its existence variational boundary，the boundary position is knew in the initialization,henceforth the boundary position need to be a part that computing result to carry on solving，so the free surface flow of numerical simulation always is a great hard and nuts problem in the computing hydrodynamics．TIlis paper rises a kind of new method-mesh flee method-SPH method，process the flowing problem ofthe fluid that has free surface，and apply to the numerical simulation of dam bursting and crest overflow of overflow dam in hydraulic engineering． The SPH method as one ofmesh free method，opposite to the method based on the mesh that has the problem ofcarrying out mesh demarcation and taking place mesh mutation，mesh ambulation during the period ofsolving，have more obvious advantage．111e kernel theory ofthe SPH method i