Chapter 11 Basics of Non-Ideal Flow So far we have treated two flow patterns,plug flow and mixed flow.Most cases we try to design equipment to approach one or the other.But real equipment always deviates from these ideals. In this chapter,we deals with: RTD state of aggregation earliness and lateness of mixing 11 Chapter 11 Basics of Non-Ideal Flow So far we have treated two flow patterns, plug flow and mixed flow. Most cases we try to design equipment to approach one or the other. But real equipment always deviates from these ideals. In this chapter, we deals with: RTD state of aggregation earliness and lateness of mixing