Film: 1. Occurs either on front (phobic) or rear-most side (philic) 2. Causes rel. high △p_(jurnp) (indep. on operating cond. for philic media) 3. Acts as inertial separator (d_(cul-off) ≈ 150 nm) Channels: 4. Transport of coalesced oil 5. Cause lower △p_(channe|) (increase with oil load) 6. Reduce efficiency of the dry filter Film & Channel-Model can explain changes in efficiency and △p during loading and in steady state!
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