Consecutive filtration of solid particles and droplets in fibrous filters

• Dynamics of solid-liquid and liquid-solid filtration efficiency experimentally investigated.
• Restructuring of dendrite-like deposits decreases the efficiency of droplet filtration.
• Covering fibers with liquid prevent the increase of the efficiency of solid particles filtration.
• Simple numerical model of deposit collapse for explanation of experimental results.

The dynamics of filtration efficiency during consecutive solid-liquid and liquid-solid aerosol filtration was investigated. Presence of solid particles deposited inside a filter affects the efficiency of liquid aerosol filtration on this filter. Similarly, liquid droplets deposited on filtration fibers inside the filter influence the removal efficiency of solid particles. It is caused by the different character of interactions between solid particles in the presence and absence of liquid. In this work these effects were identified in experimental results and their phenomenological explanation was presented.

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