Abstract:
In addition an experiments carried out both the wind tunnel test and the towing tank, the study of viscous resistance on
the catamaran vessel can also be analyzed using numerical simulation by Computational Fluid Dynamic (CFD). The
aims of the study is to analyzing the most accurate turbulence models compared with the results obtained through
experimentation. Catamaran model size adapted to test models in wind tunnel experiments. The ratio of separation to
length between demihulls (S/ L) selected is 0.3. Boundary conditions of the fluid in the numerical simulations including
the physical condition based on experiments data. Speed varied from 10, 12, 14, and 15.4 m / s. Turbulence models
tested were k- , Shear Stress Transport, and the RNG k- . Results of analysis the viscous drag coefficient on each
of the turbulence models will be compared with the experimental value. Turbulence models using a Shear Stress
Transport (SST) is the best model of turbulence with percentage difference about 2.122% higher than in the wind tunnel
experiments.
