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Recently, we received updated CAD models that are exact representations of physical models created through the OPC consortium and subsequently used by researchers in the field. These files have kindly been provided by Astra Zeneca. The purpose of these and other models in use is to help generate bench data that will better represent the behavior of an aerosol delivery system in vivo.
Three STL files are provided (S, M, L) and represent the Small, Medium and Large OPC casts and specify the 3D geometrical dimensions of each model. These files requirethe use of a special CAD program and can be downloaded here. In each STL file the ‘cylinder’ (as illustrated to the right in the figure below) shows the inhaler direction and x-y positioning relative to the cavity inlet (mouth opening). Moving the inhaler towards the cavity inlet, as indicated by the arrow in the figure, so that the mouthpiece exit is flush to the cavity inlet (see arrow head), gives a proper experimental positioning of the inhaler.
The STL-files contain minor dimensional adjustments of the model cavity inlet (mouth opening) to present the true cavity inlet geometry of the physical models that were manufactured in the OPC project