Numerical Simulation Of Hydrodynamic Characteristics Of Cylindrical Hollow Artificial Reef In Wave-current

In recent years,human plundering of marine resources and marine environmental pollution intensified,resulting in the gradual decline of fishery resources.The construction process of marine pasture confirms that artificial reefs play an important role in the restoration and protection of fishery resources and also improve the marine ecological environment of offshore waters.The hydrodynamic characteristics of artificial reefs include the flow field effect and stability of artificial reefs.The field effect of artificial reefs is related to the ecological effect of artificial reefs,and the safety and stability of artificial reefs are related to the service life of artificial reefs and whether artificial reefs can play a normal role.In the complex marine environment,artificial reefs in the seabed will be effected by waves and water flow,the study artificial fish reef hydrodynamic characteristics under the common action of wave and water flow more in line with the actual situation,for artificial reef design,assessment of artificial fish Reefs produce ecological effects to provide a more accurate theoretical basis.Based on the principle of boundary wave making method,a 3D-numerical wave flow flume is established by using FLUENT software to simulate the hydrodynamic characteristics of artificial fish reef under alone water flow,alone wave and wave current.The numerical model is used to simulate the force and surrounding flow field of the cylindrical hollow artificial reef under the action of alone wave,alone water flow and wave current in seven wave current combinations.The results of the numerical simulation are compared with those of the physical model experiment under the corresponding conditions.The results show that the numerical simulation can be used to simulate the hydrodynamic characteristics of artificial reefs.According to the force results of numerical simulation,the hydrodynamic coefficients under the combined action of wave currents are analyzed.At the same time,the stability of cylindrical hollow reefs under seven kinds of wave current conditions is also checked.Based on the numerical simulation of the flow field around the artificial reef,the flow field around the cylindrical hollow reef under the action of alone water flow,alone wave and wave flow is analyzed,and the effects of different flow velocity and different wave current conditions on the wake vortex of cylindrical hollow reefs are studied.