Structured bubbling flow in fluidized beds with oscillating gas injection which alternates with horizontal position

Structured bubbling with a triangular lattice pattern has been demonstrated previously to form in fluidized beds with oscillated gas injection velocity. Here, we demonstrate using two-fluid model simulations that dividing the gas distributor into slices and oscillating gas flow with a phase offset between consecutive slices enables structured bubbling to form with a wider range of bubble sizes and lattice configurations. Local particle solidification below bubbles leads to the formation of these structures, as manifested in high particle pressures in simulations. Varying the number of slices and phase offset enables a number of configurations that mix particles faster than cases with conventional structured bubbling or unstructured bubbling with the same overall gas flow rate.