Numerical Calculation of Viscous Flows for Two HSVA Tankers

J. Ocean Eng. Technol. 1999;13(2):138-146.

Kwak, Young-Ki;

HSVA 두 탱커 선형에 대한 점성유동 계산

곽영기;

목포대학교 선박해양공학과;

Keywords: RANS Equation, k-${varepsilon}$ Turbulence Model, Body Fitted Coordinates, Finite Volume Method, SIMPLE Method, Viscous Resistance

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

Abstract

The viscous flow around a ship hull is calculated by the use of RANS(Reynolds-averaged Navier-Stokes) solver. Reynolds stresses are midelled by using the k-${epsilon}$ turbulence model and the law is applied near the body. Body fitted corrdinates are introduced for the treatment of the complex boundary of the ship hull form and the governing equations in the physical domain transformed into ones in the computational domain. The transformed equations are numerically solved by an employment of FVM(Finite Volume Method). SIMPLE(Semi-Implicit Pressure Linked Equation) method is adopted in the calculation of pressure and the solution of the sidcretized equation is obtained by the line-by-line method with the use of TDMA(Tri-Diagonal Matrix Algorithme). To assure the proprietty of this computing method, HSVA tanker and Dyne hull are calculated ar both model and ship scale Reynolds number. Their reaults of pressure distributions on fore and aft body, axial velocity contours and transverse velocity velocity vectors and viscous resistance coefficients are compared with other's experiments and calculations.