Compared with traditional tracing method and experimental means for studying the mixing behavior of particles

the picture tracking algorithm has some advantages

such as it can rapidly and accurately analyse the movement behavior of particles at any moment

and realize continuous tracking measurement in the full field etc. The crossmixing behavior of particles under various operating conditions has been studied by using picture of particletracking algorithm. Results show that the effectiveness of particles’ crossmixing was enhanced along with increasing the apparent gas velocity

and suitable thickness of fuel layer is beneficial to particles’ crossmixing; the effectiveness of particles’ crossmixing on surface of the bed layer is better than that of particles inside the bed layer

but the effectiveness of particles’ crossmixing is related to the apparent gas velocity. Under high gas velocity

the effectiveness of particles’ crossmixing in central region of the bed layer is better than that in the two side regions; under low gas velocity

the bed layer can only realize partial fluidization

the effectiveness of particles’ crossmixing in the side regions is better than that in central region of the bed layer.