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The scale model of the rapid mix tube was constructed out of clear PVC tubing to enable easier viewing of the rapid mix process in the tube.
Figure 1. Photo of the small scale mixing orifice installed in the EPA P3 rapid mix tube display. To achieve the target head loss through the tube in this model, 60 orifices of diameter 9/64" were drilled in the rapid mix plate.
Figure 2. Photo of the entire rapid mix tube display built out of clear PVC pipe. This model will be included in-line with the doser for the conference, allowing for a continuity of flow in the demonstration.
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