In this study, 2D and 3D models of corrugated plates using the volume of fluid (VOF) model were set up to simulate the influence of corrugated structure on the wettability and heat transfer. The results show that compared with the triangular corrugation, the rectangular corrugation has a slower growth rate of wetting ratio (WR) as the Weber number (We) increases under the same corrugation length Le and corrugation depth De. The average WR of the triangular corrugation is 2.8% less than that of the smooth plate. For the triangular corrugation, the higher Le contributes to improving wettability, but the average heat transfer coefficient h_avg first decreases to the minimum at Le = 5 mm and then increases 8% to 9% to a steady value until Le = 8 mm. WR decreases with De at We ≤ 0.76. A WR correlation considering the corrugation steepness St (St = De/Le) and a critical Re correlation corresponding to the minimum wetting rate were fitted for the liquid oxygen. As the inclination angle ϕ increases, the average film thickness decreases and h_avg increases until ϕ = 75°, while the variation rate slows down afterwards. At Re = 1200, h_avg has a decreasing trend at St ≤ 0.13, increases at St ≥ 0.14 and reaches a plateau after St = 0.24 as St increases. It increases by 30.6%, 47.4%, and 44.4% for the inclination angle ϕ = 30°, 60°, 90° cases from St = 0.14 to 0.24. The enhancement is caused by the vortices existing at St ≥ 0.14.

中文翻译：

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不同波纹结构斜板降膜润湿性及传热数值研究

在本研究中，使用流体体积 (VOF) 模型建立了波纹板的 2D 和 3D 模型，以模拟波纹结构对润湿性和传热的影响。结果表明，在相同的波纹长度Le和波纹深度De下，矩形波纹与三角波纹相比，随着韦伯数( We )的增加，润湿比( WR )的增长速度较慢。三角波纹的平均WR比光滑板小2.8%。对于三角波纹，较高的Le有助于提高润湿性，但平均传热系数h _avg首先在Le  = 5 mm处减小到最小值，然后增加 8% 到 9% 到一个稳定值，直到Le  = 8 mm。当We  ≤ 0.76 时，WR随De下降。考虑波纹陡度St ( St  =  De / Le )的WR相关性和对应于最小润湿率的临界Re相关性适用于液氧。随着倾角ϕ 的增加，平均薄膜厚度减小，h _avg增加，直到ϕ = 75°，而此后变化率减慢。在Re  = 1200 时，h _avg在St  ≤ 0.13处呈下降趋势，在St  ≥ 0.14处增加，并在St  = 0.24 之后随着St 的增加而达到平稳状态。对于倾斜角φ  = 30°、60°、90° 的情况，它从St  = 0.14 增加到 0.24 ，分别增加了 30.6%、47.4% 和 44.4% 。增强是由St  ≥ 0.14处存在的涡流引起的。