With the structure of the experimental pipeline system, the amount of turbulence intensity reduction by a single transient event (
) was about 1.822. Data for chlorine concentration under different hydraulic conditions over 4 days were used to compare the rate of chlorine decay. In this study, each transient event has an identical total turbulent intensity that is repeated every 10 seconds. Therefore, Equation (17) can be simplified as follows:18Table 5 summarizes the total number of transient events over 4 days and the corresponding total amount of turbulence intensity reduction. The total reduction of turbulence intensity, , increased as the interval between transient events interval was decreased.
) was about 1.822. Data for chlorine concentration under different hydraulic conditions over 4 days were used to compare the rate of chlorine decay. In this study, each transient event has an identical total turbulent intensity that is repeated every 10 seconds. Therefore, Equation (17) can be simplified as follows:, increased as the interval between transient events interval was decreased.Table 5
Total turbulence intensity reduction ( = 1.822)
| Transient event interval | Number of transient event during 4 days (N) | Total amount of turbulence intensity reduction () |
|---|---|---|
| Steady state (No transient event) | 0 | 0 |
| 40 min | 151 | 274.8997 |
| 20 min | 375 | 682.717 |
| 10 min | 948 | 1,727.655 |
| 5 min | 2,404 | 4,379.447 |
| 2.5 min | 5,330 | 9,712.182 |
| Transient event interval | Number of transient event during 4 days (N) | Total amount of turbulence intensity reduction () |
|---|---|---|
| Steady state (No transient event) | 0 | 0 |
| 40 min | 151 | 274.8997 |
| 20 min | 375 | 682.717 |
| 10 min | 948 | 1,727.655 |
| 5 min | 2,404 | 4,379.447 |
| 2.5 min | 5,330 | 9,712.182 |