Study On Pattern Of Motion Of Stratified Flow Under Mangrove Equivalent Theory Model Of Mudflat Beach

Muddy coasts composed of viscous fine-grained sediments are widely distributed on the coasts of China's Bohai Sea,Liaodong Bay,Laizhou Bay and northern Jiangsu Province,Zhejiang,Fujian,Guangxi and Guangdong provinces.In recent years,people have increasingly emphasized the functionality and eco-friendliness of coastal protection measures.The ecological coast led by mangroves has become a research hotspot.However,the existence of the near-shore woody plant buffer zone also led to the coupling of plant-wave-mud layer.In this case,the description of the fluid structure characteristics is still not perfect.The velocity structure of the water body under the interaction of the three,The phase relationship,and the changing law of wave elements lack a complete understanding and comprehensive analysis,and further research is needed.To solve these problems,this paper uses a combination of theoretical analysis and numerical calculation to establish a fluid control system based on the Euler coordinate system to simulate the propagation of nonlinear waves under the action of a rigid equivalent forest belt in the cement double-layer model.Assuming that the fluid is incompressible and there are regular waves(that is,linear waves)on the free surface,the force of the plant on the fluid is added to the theoretical model in the form of plant drag force to construct a plant-wave-mud coupling effect The theoretical model of the double-layer fluid,the flow field characteristics of the double-layer fluid model of cement under the action of rigid forest belts,the movement characteristics of surface waves and interface waves under the influence of different bottom mud layers and plants,and the calculation of the bottom mud layer Factors such as density,wave circle frequency,plant area ratio and plant length-to-diameter ratio affect the wave velocity field,pressure field,corresponding phase relationship,and the amplitude ratio of interface waves to surface waves.The velocity structure and flow field law of nonlinear waves under rigid forest belt are systematically studied.