CAJ | 학술논문

文章采用格子Boltzmann单相自由面模型模拟飞溅流动问题，以楔形体入水问题为模拟对象，研究了网格精细度、计算域、水动力相似参数对飞溅效果的影响。研究表明，亿量级网格下入水飞溅射流及飞溅端部的细小液滴结构十分清晰，模拟结果明显优于百万量级、千万量级网格；计算域超过模型尺度3倍后飞溅效果不受影响；以自由液面面积S的增长率η为比较参数，当Re数、Fr数较小时对飞溅效果有明显影响，大于一定数值后，飞溅效果基本一致。
문장채용격자Boltzmann단상자유면모형모의비천류동문제，이설형체입수문제위모의대상，연구료망격정세도、계산역、수동력상사삼수대비천효과적영향。연구표명，억량급망격하입수비천사류급비천단부적세소액적결구십분청석，모의결과명현우우백만량급、천만량급망격；계산역초과모형척도3배후비천효과불수영향；이자유액면면적S적증장솔η위비교삼수，당Re수、Fr수교소시대비천효과유명현영향，대우일정수치후，비천효과기본일치。
The single-phase free surface Lattice Boltzmann Model (LBM) is used to simulate the splash flow. Wedge water-entry problem is simulated to study the splash characteristics influenced by grid refinement, computational domain and hydrodynamic similarity parameters. The results show that the flow structure of the splash jet is much finer with a grid of hundreds million size compared to the coarse ones. With the com-putational domain of more than three times of the size of wedge, it could get almost the same splash charac-teristics. Reynolds number and Froude number will significantly affect the splash structure when they are in small values;while they are large enough, the splash images will keep similar.