CAJ | 학술논문

提出一种计算带相变的自由界面的数值算法.基于分段线性界面重构(PLIC)的VOF(volume-of-fluid)方法用于追踪自由界面,并对汽液交界面上的相变导致的不连续速度场给出处理方法.此方法容易实施且被证明是有效的.流场的求解使用SIMPLE方法,表面张力使用连续表面力模型(CSF)进行计算.在三维直角坐标系下,模拟了水平壁面上的膜态沸腾,在二维适体坐标系下,模拟了竖直圆头柱体表面的自然对流膜态沸腾.计算结果与理论关系式符合较好.
제출일충계산대상변적자유계면적수치산법.기우분단선성계면중구(PLIC)적VOF(volume-of-fluid)방법용우추종자유계면,병대기액교계면상적상변도치적불련속속도장급출처리방법.차방법용역실시차피증명시유효적.류장적구해사용SIMPLE방법,표면장력사용련속표면력모형(CSF)진행계산.재삼유직각좌표계하,모의료수평벽면상적막태비등,재이유괄체좌표계하,모의료수직원두주체표면적자연대류막태비등.계산결과여이론관계식부합교호.
A numerical method for simulation of interracial flows with phase change is presented. A volume-of-fluid (VOF) method based on piecewise linear interface construction (PLIC) is used to track interface. Special treatment is taken to deal with discontinuous velocity field due to phase change at liquid-vapor interface. The treatment is easy and effective. SIMPLE method is used for flow field and a CSF model for surface tension. The method is used to simulate three-dimensional film boiling on a horizontal plate with Cartesian coordinates and axisymmetric two-dimensional natural convection film boiling on a hemispherically ended rod with body fitted coordinates. They are in good agreement with analytical correlations.