Numerical Simulation of Flow Around Surface Piercing Vertical Cylinder

This research presents a numerical simulation of flow around surface piercing vertical cylinder at different Froude numbers. The Finite Volume Method (FVM) based on Navier-Stokes Equations is used for the simulation. The Shear Stress Transport (SST) k-omega turbulence model has been incorporated to capture the turbulent boundary layer. The Volume of Fluid (VOF) method is applied to track the free surface of the water. A highly accurate scheme named High-Resolution Interface Capturing (HRIC) is implemented with the volume of fluid method for flux evaluation. To accomplish all of the above procedures, a commercial CFD software 'ANSYS-FLUENT' is used. The profile of air-liquid interface on a cylinder, drag coefficient, velocity fields, and dynamic pressure fields at different liquid layer and wall shear stress is computed and compared with previous experimental and simulation results. At a particular Froude number, the wave-induced separation of velocity fields is studied and it is found that the effects decrease with increasing depth. It is also found that the free surface is highly influenced by increasing Froude number. The dynamic pressure and drag coefficient increase with the increase in the Froude number. Finally, separation regions of wall shear stress are studied for three different Froude numbers.