A Numerical Study on the Oscillating Flow Induced by an Acoustic Field around Coal Particles

Table 3

Summary of flow direction and axial pressure gradient for an oscillating flow.

	Flow direction	Angular direction
0~0.25	From left to right		<0
0.25~0.5	From right to left		<0
0.5~0.75	From right to left		>0
0.75~1	From left to right		>0
0~0.25	APG	FPG	APG
0.25~0.5	FPG	APG	FPG
0.5~0.75	APG	APG	FPG
0.75~1	FPG	FPG	APG