CFD-based hydrodynamic analysis of bionic fish

Abstract

Underwater robots are now widely used in marine exploration. Traditional underwater robots are large, less maneuverable, have high resistance to underwater operation and are also not conducive to close observation of fish behavioral habits. Bionic fish robots can compensate for some of these disadvantages very well. At the same time, there is still relatively little work on the shape design and analysis of bionic fish robots, so it is important to study the shape of bionic fish and perform hydrodynamic analysis on them. Based on the theory of fluid mechanics, this paper systematically applies the dynamic properties of fluid and designs an underwater robot imitating a carp using SOLIDWORKS 3D modelling software. Numerical simulations using CFD software show that this fish-like form structure has a low drag coefficient and a reasonable design, and can also provide guidance for form design optimization work. It is clear from the literature that the analysis of the shape of bionic fish is still focused on certain specific structures and that there is a lack of work on the overall analysis and evaluation of the shape. The proposed research method is not only applicable to the overall analysis of the bionic fish shape, but also to most of the bionic fish shape analysis scenarios, which is highly applicable.