The porous media methodology is used to describe the filter bags and their surface ash layer seepage flow. On this basis

the discrete particle model(DPM)

as implemented in Fluent software

is employed to simulate the dynamics of dust particles movement and deposition in a baghouse filter. The effects of dust particle size on evolving morphology of the cake on the filter bags are investigated

and the influence of additional resistance of the filter cake on subsequent ash particle deposition is explored. The results show that

when the duration of dust removal is sufficiently long

the cake thickness and pressure loss in the baghouse filter increase in a linear fashion over time. For a constant dust mass flow rate

the pressure loss becomes higher with smaller dust particles. The smaller ash particles are transported more effectively by the upward airflow to the top of the vertical filter bag

whereas the larger particles

due to their weight

tend to settle in the middle area. This results in significant differences in the distribution of cake thickness. In contrast to conventional algorithms that neglect cake resistance

the proposed model

which incorporates this resistance through advanced development in commercial software

predicts a more uniform distribution of dust thickness

which is more consistent with the actual situations. This conclusion can provide references for improving the operational efficiency of baghouse filters.