Visous resistance analysis of a ship using numerical solutions

J. Ocean Eng. Technol. 1997;11(2):100-106.

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Keywords: RANS equation, k-$varepsilon$ turbulence model, body fitted coordinates, Finite Volume Method, SIMPLE method, viscous resistance, geosim model

핵심용어: RANS 방정식, k-$varepsilon$ 난류모형, 물체적합좌표계, 유한체적법, SIMPLE법, 점성저항, 상사모형

Abstract

Viscous flow around an actual ship is calculated by an use of RANS(Reynolds-averaged Navier-Stokes) solver. Reynolds stress is modelled by using k-$varepsilon$ turbulence model and the law of wall is applied near the body. Body fitted coordinates are introduced for the treatment of the complex boundary of the ship hull form. The transformed equations in the computational domain are numerically solved by an employment of FVM(Finite Volume Method). SIMPLE(Semi-Implcit Pressure Linked Equation) method is adopted in the calculation of pressure and the solution of the disssssssscretized equation is obtained by the line-by-line method with the use of TDMA(Tri-Diagonal Matrix Algorithme). The subject ship model of actual calculation is 4,410 TEU class container carrier. For 4 geosim models the calculated viscous resistancce values are compared with the model test results and analyzed on their componentss. The resistance performance of an actual ship is predicted very resonably, so this mothod may be utilized as a design tool of hull form.