Depending on the operating conditions such as liquid and vapor flow rates, different flow regimes of liquid can be observed on the trays of a distillation column with specified dimensions. Since these flow regimes have different characteristics, a specific hydraulic equation can be proposed for each of them. In this paper, the effect of applying the different hydraulic equations in a rigorous dynamic model on the simulation results is investigated. As the result of this study, the dynamic behaviors of a distillation column are compared for different flow regimes after an increase in the feed flow rate.