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.

中文翻译：

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流化床中的结构化鼓泡流，振荡气体注入与水平位置交替


具有三角形晶格图案的结构鼓泡之前已经证明在具有振荡气体注入速度的流化床中形成。在这里，我们演示了使用双流体模型仿真，将气体分布器分成多个切片，并在连续切片之间具有相位偏移的振荡气流，从而形成具有更大范围气泡尺寸和晶格配置的结构化鼓泡。气泡下方的局部颗粒凝固会导致这些结构的形成，如模拟中的高颗粒压力所示。改变切片数量和相位偏移可实现多种配置，与具有相同总气体流速的传统结构化鼓泡或非结构化鼓泡的情况相比，可以更快地混合颗粒。