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For a flow rate of 1 L/s with 50 cm maximum head loss, we obtained an inner pipe diameter of 1.89 in and macro-mixing and micro-mixing orifice diameters of 1.64 in and 0.94 in respectively. For the case of 2 L/s with 50-cm maximum head loss, we obtained an inner pipe diameter of 2.80 in and macro-mixing and micro-mixing diameters of 2.42 in and 1.33 in respectively. There will be changes made to make this algorithm more robust and they are in process. In the cases of higher flow-rates, it is better to transition to the waterfall rapid mix design that the research team came up with before.
Running this algorithm for flow-rates under 50 L/s gave the following results as shown below on Figure 2.
Figure 2: Rapid Mix Orifice Sizing Algorithm for Lower Flow Rates