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| Titel: |
Reservoir Oscillations with Through Flow |
| Auteur: |
A. A. Khan |
| Verschenen in: |
American journal of environmental sciences |
| Paginering: | Jaargang 3 (2007) nr. 1 pagina's 37-42 |
| Jaar: |
2007 |
| Inhoud: |
The two-reservoir problem with through flow is a common feature in wastewater treatmentplants. The start of the through flow may cause water surface oscillations in the reservoirs and velocityvariations in the connecting pipe during the initial unsteady phase that may adversely affect theoperation and under certain conditions may cause overtopping of the upstream reservoir. The classicalsolution based on the rigid mass theory is inapplicable as velocity variations within the pipe system areignored. One-dimensional mass and momentum conservation equations, based on the elastic theory,with a new set of boundary conditions are solved using the method of characteristics to investigate thewater surface oscillations in the two reservoirs and minimum velocity in the connecting pipe as a resultof the start of a through flow. The impact of a constant or variable friction factor on the velocity andwater surface oscillations in the connecting pipe is found to be negligible. The magnitude and the timeit takes to establish the through flow are found to be important parameters for the system. Optimumtime of linear increase of a given inflow rate to the final steady state discharge is investigated for anactual facility. A ramp time of 40 seconds is found to reduce the maximum water surface level from40 cm to 9.4 cm and increase the minimum velocity in the system to 85% of the final steady state velocity. |
| Uitgever: |
Science Publications (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 7 van 7 gevonden artikelen
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