The VOF interface tracking method was adopted to simulate the two-dimensional submerged gas jet scouring pit morphology in an impingement water bath dust remover.The interaction of gas/liquid twophase was obtained by force balance and momentum exchange.On the self-designed impingement water bath dust remover test bench

the submerged gas jet flushing with different gas velocities was simulated.The results show that

the gas inlet velocity is one of the main factors affecting the submerged gas jet scouring pit characteristics.The unique nature of gas/liquid two-phase determines their unique way of movement

thus affects the morphological character of the scouring pit in the expansion lag phase.Within the study range

the characteristic radius and impact depth of the scouring pit increases with the gas velocity

and so are their growth rates.