Numerical Study of the Hydrodynamic Performance During Underwater Swimming

Numerical study is conducted to evaluate the affecting factors of the hydrodynamic performance during the stage of underwater swimming,which was simulated on computation fluid dynamics commercial software FLUENT.Based on a quasi-steady state assumption,the relationships among swimmer postures,wetsuit roughness,stream pattern near body,and the total force are predicted,then make a comparative analysis of the results,by which methods to lower the total force are obtained,at last,optimum schemes on swimming stroke are present,which build a theoretical basis for the further improvement of competition results.