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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.
A numerical algorithm for calculating the free interface with phase transition is proposed.VOF (volume-of-fluid) method based on piecewise linear interface reconstruction (PLIC) is used to track the free interface and to simulate the phase transition The resulting discontinuous velocity field gives a treatment method that is easy to implement and proves to be effective Flow Field Solver The surface tension is calculated using the continuous surface force model (CSF) using the SIMPLE method In the Cartesian coordinate system, The film boiling on the horizontal wall is simulated, and the natural convection film boiling on the surface of the vertical cylinder is simulated under the two-dimensional coordinate system. The calculated result is in good agreement with the theoretical one.