Based on the downward‐penetrating particle flow through clusters and the analogy between a falling cluster and a rising bubble identified by the authors, a “type‐A‐choking‐oriented separate‐phase‐coexistence model” for the upper dilute region of fast beds was established first. Without any model parameter adjustment, the unified model predicted successfully the type C choking, the solids holdup of upper dilute region, and transitions to the high‐density fast bed and the dense suspension up‐flow.
Part of the book: Thermal Power Plants