On the behavior of nonlinear hydrodynamic coefficients of a submerged cylinder beneath the water surface

This study aims at numerically exploring the behavior of flow fields and nonlinear hydrodynamic coefficients a horizontal cylinder beneath free surface considering effects waves various shapes. The computational model is based on two-dimensional incompressible Navier-Stokes solvers along with treatment using volume fluid method. effect turbulent also considered by shear stress transport turbulence model. simulation result benchmark case submerged first validated available experiment data, where mesh convergence analysis performed. Afterward, force around are analyzed, influences shapes Reynolds numbers investigated. A state diagram representing including stable unstable stages finally proposed; this an important criterion for practice design civil structures under flow.