Industry Solutions

                 Existing models for pressure drop of wall-flow filters have mostly targeted monolithic filters.  Some have been demonstrated to yield notable accuracy when tested under a wide range of practical conditions.  However it is possible to use the pressure drop model of a monolithic wall-flow filter for a segmented one as long as the two primary filter variables influenced by the segmentation, filter filtration wall area and open frontal area, are represented adequately in the model.  In practice it is more advantageous to have a single model that would adjust filter parameters accordingly depending on the filter type.

                 Filtration walls form the core elements of the filter structure where the actual filtration of particulate takes place.  In a monolithic filter, total filtration area is simply the sum of individual filtration areas of inlet channels.  In a segmented filter some of the inlet channels use all four sides of their filtration walls while some other channels could only use three of their side filtration walls even though they structurally posses four; these latter are the channels that are adjacent to the cement attaching neighboring segments of the filter.

 

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Idea #2: Pressure Drop of Segmented Diesel Filter

Inlet channels of a segmented Silicon Carbide filter.

Cummins

Diesel Particulate Filter