Parametric study of a low wake-wash inland waterways catamaran

The wake wash from passing ships can cause environmental damage. the wake wash is animportant issue for naval architects and shipbuilders in concentrating on more environmentally friendlydesigns. this paper presents results of a parametric study of catamaran hull form to obtain low wakewash hull form configurations or low speed inland waterway boats. the study uses a computational fluiddynamics (cfd) simulation, and model experiments were carried out for validation of the cfd softwareset-up. the study concentrates on the asymmetric catamaran hull form. the investigation is conductedon two configurations of hull form; flat side inward (fsi) and flat side outward (fso) configurations. theinvestigation is conducted on a hull form with a length to beam .l=b/ ratio of 12.2, 15.2 and 18.3 and aseparation to length .s=l/ ratio of 0.2, 0.3 and 0.4. the results based on wave height criteria at variouslongitudinal cuts have shown that the fso configuration has a lower wake wash compared with the fsiconfiguration. considering l=b and s=l ratios, hull forms with a larger separation or higher l=b ratiosproduce lower wave heights.