Influence of steady flow direction on surrounding flow field under internal solitary wave and research on cylinder force
WU Tao
LU Chengkuan
LIU Liqiao
SU Ying
LI Xian
CAO Zhouhong
Abstract：In the development of marine resources,the effects of internal solitary waves and ocean cur-rents on the structural foundation of the constructed offshore platform cannot be ignored,and the load characteristics of the structural foundation under the combined action of the two are particularly com-plex.In this paper,the fluid simulation program FLOW-3D based on the finite difference method and the source term method were used to generate waves and boundary conditions to generate flow.The hy-drodynamic load on the cylinder under the action of the steady flow direction and the characteristics of the surrounding flow field under the action of the internal solitary wave were studied.The results showed that:(1)By comparing the theoretical solution of the internal solitary wave with the numerical solution of the steady flow at different velocities,it is found that the steady flow directly affected the waveform of the internal solitary wave;(2)The flow velocity of the steady flow would cause the propa-gation of the internal solitary wave;(3)The increase of the amplitude of the inner solitary wave or the increase of the steady flow velocity would lead to the increase of the resultant force on the cylinder,and the force of the wave in the same direction was greater than that in the opposite direction of the wave.
Keywords：internal solitary wavemass sourcesteady flownumerical simulation
Publication Date：2025-08-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 44-52 )