### PEMANFAATAN TEKNOLOGI DIMPLE PADA LAMBUNG KAPAL UNTUK MENGURANGI TAHANAN KAPAL

#### Abstract

*Research in fluid mechanics are developed to decrease the resistance of the ships by the flow on the surface of wet surace area. Fluid on the wet surface area will be create a friction. One of solution to decrease the force of friction is modification itself. The applications of marine, resistance of the ship will be effect to the require power to move the ship on the service velocity. Decrease of the total resistance will be decrease the require power of the engine that affect to the oil consumption of the ship. Dimples is the basines that can modification the fluid flow on the wet surface area of the ships. It can reduce the total resistance. The purpose of this research are to know the information about best horizontal distance between each dimple, to know the value the friction coefficient, and the total resistance between dimple installation and non dimple or normal hull construction. The method on this research is the simulation using Computational Fluid Dynamics (CFD). Dimple using 0,5 m for diameter, 0,15 m for the depth, and 1,5 m for the vertical distance. The principle dimension for the length between perpendicular is 117 m, breadth 20 m, height 9,2 m, and draught 6,9 m. The variables is the horizontal distance with the value 3, 4, 5 m, velocity 8, 10, 12, 14, 16, 18 knots. The results of this research are the best distance is 4 m and can reduce the total resistance 16,48 %.*

*Keywords:** Friction Force, Dimple, Computational Fluid Dynamics*

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