Depth filters are used in air-conditioning, cleanroom technology and exhaust gas treatment. Particles are separated inside a porous structure. Detachment of separated particles and stepwise transportation does not happen in most applications. Nevertheless reactive components in deposited particle structures can cause rearrangement and detachment. This processes are relevant in soot particle filtration and therefore fundamental research about this phenomena should be made in this project.

               Figure: Pictures of rearrangement and detachment of particles on a single fiber. Fiber is inside an air
               stream with 440°C and 0.4 m/s.