Bounded and Unbounded Analysis

In Sections II and VI, the stability of multiphase systems was analyzed for unbounded and bounded beds, respectively. In the unbounded case, it was dispersion that was the most important parameter in deciding the stability of the system. An increase in the dispersion coefficient led to a 

From this discussion, we propose the following procedure to predict transitions in two-phase systems in a quantitative manner  

Check the stability using the unbounded bed criterion, neglecting the sparger and column dimensions. If the bed is unstable, then the bed will be unstable throughout, no matter how well the sparger is de- 

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