General domain coverage method (GDCM) was proposed to determine the region for each computing node efficiently by comparing all cell nodes

where these regions were helpful for Host to identify which computing node solid particle belongs to. Particle information was passed among host and nodes with the help of Fluent UDFs. The parallel algorithm for CFD-DEM model was developed successfully to simulate gas-solids flows in the fluidized beds (FBs) which were meshed in arbitrary shapes. Based on the comparison of calculation efficiency between parallel algorithm and serial algorithm

the bubble behaviors were studied in a FB with an immersed tube in a single jet FB

and the solids exchange behaviors between two half beds were simulated and compared with experimental results in a dual leg FB. The simulation results showed that the particle information was passed between host and nodes efficiently by parallel algorithm. It was efficient for GDCM to determine which computing node particles are in. The simulated bubbling frequency (about 3 Hz) was similar as Rong's simulation result. Compared with Bokkers' simulated and experimental jetting bubble size

the more similar bubble size and solid velocity vectors around the bubble were obtained by the parallel algorithm. The solid exchange between two half beds in both forms of the first (~1 Hz) and second (>2 Hz) domain frequency was simulated

which was similar as the experimental result.