A fluid structure interaction method for towed cable system
Ocean towing system is a classic fluid-structure coupling system.However,towing systems are typically dy-namically simulated based on constant drag coefficients determined from experimental data.To improve the method of se-lecting a fixed empirical drag coefficient for simulation,this paper applies the Morrison equation to the nodal position finite element method.The improved nodal position finite element method(NPFEM)is combined with the Reynolds number aver-aged N-S(RANS)method to predict the hydrodynamic forces along the cable within the Reynolds number range.By calcu-lating the obtained hydrodynamic forces,the NPFEM is interpolated for fluid dynamics.The results indicate that the simula-tion results obtained by this method are more consistent with the experimental results,and better simulate the real motion of the towing cable.This FSI method reveals the vibration caused by the cable dynamics and vortex structures determined by the real strong fluid dynamics around the towing system.
towed cable systemnodal position finite element methodreynolds averaged navier stokes equationsboundary layer separationfluid structure interaction
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