Predicting Pressure Drop in Venturi Scrubbers Based on Annular Two Phase Flow Model

Venturi scrubber is one of the most effective devices controlling the air pollution. High pressure drop in these devices is one of the problems affecting their efficiency. So it is necessary to develop a model to predict pressure drop in venturi scrubbers accurately. There are many models for this purpose. The model of Viswanathan is based on annular two phase flow. This is a flow pattern that includes a flow of liquid film layer on the walls and a flow of gas and liquid drops in the core. Due to similarities between annular two phase flow pattern and the flow of gas and drops in venturi scrubber, this model can predict pressure drop in these devices effectively. Unfortunately there are some ambiguities in the model proposed by Viswanathan. In the present work it is tried to modify this model to remove its ambiguities and improve it. Good agreement between results of the proposed model with experimental data shows the ability of this model to predict pressure drop in venturi scrubbers.