CAJ | 학술논문

采用计算流体力学(computational fluid dynamics,CFD)中的VOF方法对规整填料表面液相分布进行了三维建模和仿真,实现规整填料内液相分布的可视化并得到了液膜厚度和有效相界面积比等相关定量信息.通过分析比较不同物系的数值模拟结果,发现液体的表面张力和黏度都对填料表面上液体分布有影响.表面张力越小,液相在填料片上分布越均匀,有效相界面积比越大,液膜厚度越小;黏度增加,有效相界面积比和液膜厚度也随之增加.较之于黏度对液相分布的影响程度,表面张力的影响程度更大,为主要影响因素.本文还提出一个预测有效相界面积比的新公式,并将数值模拟结果与已有文献进行对比,吻合性较好.
채용계산류체역학(computational fluid dynamics,CFD)중적VOF방법대규정전료표면액상분포진행료삼유건모화방진,실현규정전료내액상분포적가시화병득도료액막후도화유효상계면적비등상관정량신식.통과분석비교불동물계적수치모의결과,발현액체적표면장력화점도도대전료표면상액체분포유영향.표면장력월소,액상재전료편상분포월균균,유효상계면적비월대,액막후도월소;점도증가,유효상계면적비화액막후도야수지증가.교지우점도대액상분포적영향정도,표면장력적영향정도경대,위주요영향인소.본문환제출일개예측유효상계면적비적신공식,병장수치모의결과여이유문헌진행대비,문합성교호.
A volume of fluid (VOF) model of the computational fluid dynamics (CFD) method was used to simulate the liquid distribution on the structured packing surface. 3D simulation visualized liquid distribution. The results were used to estimate liquid film thickness and effective interfacial area ratio on the structured packing surface quantitatively,and the results were validated with existing correlations in the literature. Different systems with different surface tension values were used in the simulation and the effect of both surface tension and viscosity of liquid phase on liquid distribution were examined. Based on the simulation a new equation to predict the effective interfacial area ratio was proposed. The simulation results showed that the CFD method can be used as an effective tool to provide information on the details of the gas and liquid flows in complex packing geometries.