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

Figure 5

Velocity vectors due to an acoustic field with SPL = 135 dB around a spherical particle of diameter 100 μm at different times during one cycle: (a) (no steady flow), , and (50 Hz); (b) (no steady flow), , and (5000 Hz). , , , , , , , and .

(a) and ( = 50 Hz)

(b) = 0.396 and ( = 5000 Hz)