DWT 95K Tanker 모형선에 대한 점성유동의수치계산

Abstract

This paper presents the numerical calculation of the viscous flow for a full ship model. The mass and momentum conservation equations are used for governing equations, and the flow field is discretized by the Finite-Volume Method for the numerical calculation. An algebraic grid and elliptic grid generation techniques are adopted for generation of the body-fitted coordinates system, which is suitable to ships hull forms. Time-marching procedure is used to solve the three-dimensional unsteady problem, where the convection terms are approximated by the QUICK scheme and the 2nd-order central differencing scheme is used for other spatial derivatives. A Sub-Grid Scale turbulence model is used to approximate the turbulence, and the wall function is used at the body surface. Pressure and velocity fields are caculated by the simultaneous iteration method. Numerical calculations were accomplished for a Crude Oil Tanker(DWT 95,000tons, Cb=0. 805) model. Calculation results are compared to the experimental results and show good agreements.