CAJ | 학술논문

提出了一种新型的拟循环边界条件，并采用计算流体力学(computational fluid dynamics，CFD)中VOF （volume of fluid）多相流模型对液相在两相邻规整填料特征单元上的分布进行三维仿真模拟，数值模拟结果与已有经验公式具有较好的吻合性。从介尺度的角度出发，系统地研究了规整填料的宏观结构和微观结构对液相在规整填料片上分布的影响。结果表明：规整填料的波纹倾角和表面微观结构对液相特别是低表面张力物系在规整填料内的流动形态有很大的影响，而比表面积对液相在规整填料内的流型几乎无影响。相同液相流率下，液相在高比表面积、填料表面有波纹的Y型规整填料片上的分布较好，具有较好的流体力学性能。
제출료일충신형적의순배변계조건，병채용계산류체역학(computational fluid dynamics，CFD)중VOF （volume of fluid）다상류모형대액상재량상린규정전료특정단원상적분포진행삼유방진모의，수치모의결과여이유경험공식구유교호적문합성。종개척도적각도출발，계통지연구료규정전료적굉관결구화미관결구대액상재규정전료편상분포적영향。결과표명：규정전료적파문경각화표면미관결구대액상특별시저표면장력물계재규정전료내적류동형태유흔대적영향，이비표면적대액상재규정전료내적류형궤호무영향。상동액상류솔하，액상재고비표면적、전료표면유파문적Y형규정전료편상적분포교호，구유교호적류체역학성능。
A volume of fluid multiphase-flow model for two adjacent sheets of structured packing was used to investigate the effect of structure of structured packing on liquid distribution in meso-scale. The three-dimensional computational fluid dynamics (CFD) simulation visualized liquid distribution,and the results showed good agreement with the existing correlation for effective area. Numerical simulation results showed that both angle of inclined corrugation to the horizontal and micro-structure of surface played significant roles in liquid distribution and flow pattern on structured packing surface, while specific area of packing had little influence. Under a specific liquid load,better liquid distribution and hydrodynamic performance were found on the Y-type of structured packing with larger specific area and coarser surface.