Figure 6. Free chlorine distribution along the sampling ports under different flow rates. Each dot represents experimental data, and each point on the black line is the expected chlorine concentration obtained from computational fluid dynamics (CFD) simulation with a parallel first-order decay model. The red-dotted line is the desirable concentration at the given flow rate: (a) 600 L min−1 of flow rate, (b) 700 L min−1 of flow rate, (c) 800 L min−1 of flow rate, (d) 900 L min−1 of flow rate.

Figure 6. Free chlorine distribution along the sampling ports under different flow rates. Each dot
represents experimental data, and each point on the black line is the expected chlorine concentration
obtained from computational fluid dynamics (CFD) simulation with a parallel first-order decay
model. The red-dotted line is the desirable concentration at the given flow rate: (a) 600 L min−1 of flow
rate, (b) 700 L min−1 of flow rate, (c) 800 L min−1 of flow rate, (d) 900 L min−1 of flow rate.