A Fluid-Structure Interaction Simulation Method for Fish Movement in Marine Environment

Abstract

The invention discloses a fluid-solid coupling simulation method for the movement of fish schools in an ocean environment, which can be used to solve the movement of small but large number fish schools under a large-scale flow field and the influence on the flow field. The present invention adopts the finite element to establish the flow field, regards the small solid in the flow field as a point with coordinates, velocity, and acceleration attributes, and determines the force of the flow field on the solid through the concentrated parameter method, and at the same time, the force is fed back to the flow field. The field is the additional force of the finite element where the solid point is located, so as to realize the fluid-solid coupling. The invention aims at the situation that the flow field area is much larger than the size of the solid, avoids the part of solid modeling in the traditional fluid-solid coupling, and realizes the dynamic response of the fluid-solid coupling at the same time, which greatly saves the amount of calculation and the difficulty of modeling .

Description

technical field [0001] The invention belongs to the field of fluid analysis, and relates to flow field simulation and concentrated parameter method modeling, in particular to a fluid-solid coupling simulation method for fish school movement in a marine environment. Background technique [0002] Fluid-solid coupling mechanics is a branch of mechanics generated by the intersection of fluid mechanics and solid mechanics. It is a science that studies the interaction of various behaviors of deformed solids under the action of a flow field and the influence of solid configuration on the flow field. . The important feature of fluid-solid interaction mechanics is the interaction between two-phase media, and the deformed solid will deform or move under the action of fluid load. Deformation or movement affects fluid movement in turn, thereby changing the distribution and magnitude of fluid loads. It is this interaction that will produce various fluid-solid coupling phenomena under di...

AI Technical Summary

Problems solved by technology

[0004] Solids in the ocean, such as fish schools, are special in that their geometric size is negligible compared to the sea area to be studied, but their large number makes it impossible to ignore their influence on the flow field when calculating the flow field

[0005] The traditional moving boundary method treats such objects as porous and sparse media, but this method equates a large number of small objects to a solid with a specific shape, which limits the relative position of the solids to be close together and cannot change greatly. The sparsity coefficient cannot be changed and cannot reflect the actual situation

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