Title :
Numerical simulation of free surface effect on moving hydrofoil near free surface
Author :
Raza, N. ; Mehmood, I. ; Rafiuddin, H. ; Bilal, S. ; Rafique, M.
Author_Institution :
CESAT, Islamabad, Pakistan
Abstract :
Present study is about free surface effects over shallowly immersed hydrofoil. Naca0012 hydrofoil at angle of attack 5 degree, Froude number of 0.5672 and Reynolds number of 1.7695e6 is studied using unsteady Reynolds average Navier-stokes code with a k-epsilon turbulence model and free surface volume of fluid (VOF) tracking method. Naca0012 hydrofoil is moved with various depths using moving mesh methodology. It is observed that lift and drag coefficient of hydrofoil increases as it approaches free surface. Computational results are validated with the experimental results of Duncan at a specified depth ratio. Numerical results showed good agreement with the experimental results.
Keywords :
Navier-Stokes equations; aerospace components; computational fluid dynamics; drag; external flows; flow instability; flow simulation; hydrodynamics; mesh generation; surface waves (fluid); turbulence; Froude number; Naca0012 hydrofoil; attack angle; depth ratio; drag coefficient; free surface VOF tracking method; free surface effect; k-epsilon turbulence model; lift coefficient; moving hydrofoil; moving mesh methodology; numerical simulation; shallowly immersed hydrofoil; unsteady Reynolds average Navier-stokes code; volume of fluid tracking method; Boundary conditions; Gold; Propulsion; Sea surface; Surface waves; Tracking; CFD; Dynamic Mesh; Free Surface Flows; NACA0012 hydrofoil; Wave Elevation;
Conference_Titel :
Applied Sciences and Technology (IBCAST), 2013 10th International Bhurban Conference on
Conference_Location :
Islamabad
Print_ISBN :
978-1-4673-4425-8
DOI :
10.1109/IBCAST.2013.6512162
