A Numerical Study on the Sloshing Characteristics in a Two-dimensional Rectangular Tank Using the Level Set Method

Abstract The sloshing phenomena in a two-dimensional rectangular tank are investigated using a level set method based on finite volume method. The code valida tions are performed by comparing between the present results and previous numerical results, which gives a good agreement. We present the streamlines pattern, free surface shape, maximum free surface elevation and pressure fluctuation patterns in the tank under the pitch and surge motions with various frequencies. These two different motions cause the different flow structures in the tank. The time variations of surface elevation and pressure at the different locations in the tank strongly depend on the exciting frequency of tank moving. ※Keywords: Sloshing(슬로싱), Free surface(자유 표면), CFD(전산유체역학), Level set method(레벨셋법), Streamline(유선), Pressure fluctuation(압력 변동), Two-phase flow(이상 유동) 1. 서 론 움직이는 탱크(tank) 내부의 슬로싱(sloshing) 문제는 광범위한 산업분야에서 중요시 되고 있다. 특히 항공, 해상, 도로 및 철도운송등에서 액체 저장 탱크 수송 시스템의 안전성 문제등에 깊은 관련이 있다. 일반적으로 슬로싱 문제를 수치해석적 방법으로 접근하는데 있어서 크게 두 가지 어려운 점이 있다. 첫째는 계산 영역(computational