Kirchheim, Norma ; Schaffner, Jörg ; Oberlack, Martin (2005)
Parameter study of a flush wave using numerical modelling.
10th International Conference on Urban Drainage. Copenhagen/Denmark (21-26 August 2005)
Konferenzveröffentlichung, Bibliographie
Kurzbeschreibung (Abstract)
The management of deposits in combined sewers is very important to avoid aquatic pollution. One ecological possiblity to clean sewers is the use of a flushing device to remobilize deposits. In the past several experimental or one dimensional numerical investigations were carried out to gain more information on the efficiency of flush waves in sewer channels. This paper presents a scientific research carried out on a stormwater holding tank. The analysis is based on three dimensional numerical modelling solving the Navier-Stokes equation extended by the k-ε turbulence model. The free surface water-air interaction is handled by the Volume of Fluid method. Several scenarios for different boundary conditions concerning the flushing device have been tested. To evaluate the cleaning efficiency it was very important to investigate the shear stresses created by the flush wave. It could be shown that the influence of the initial condition is less important for long-term purifications. The length of the channel which could be cleaned by a flush wave depends predominantly on the flushing volume and its ratio to the dam height. According to this investigation flush wave cleaning is a good alternative for cleaning of a stormwater holding tank of 350 m length compared to classical more etablished methods.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2005 |
| Autor(en): | Kirchheim, Norma ; Schaffner, Jörg ; Oberlack, Martin |
| Art des Eintrags: | Bibliographie |
| Titel: | Parameter study of a flush wave using numerical modelling |
| Sprache: | Englisch |
| Publikationsjahr: | 2005 |
| Buchtitel: | 10th International Conference on Urban Drainage, Copenhagen/Denmark, 21-26 August 2005 |
| Veranstaltungstitel: | 10th International Conference on Urban Drainage |
| Veranstaltungsort: | Copenhagen/Denmark |
| Veranstaltungsdatum: | 21-26 August 2005 |
| Kurzbeschreibung (Abstract): | The management of deposits in combined sewers is very important to avoid aquatic pollution. One ecological possiblity to clean sewers is the use of a flushing device to remobilize deposits. In the past several experimental or one dimensional numerical investigations were carried out to gain more information on the efficiency of flush waves in sewer channels. This paper presents a scientific research carried out on a stormwater holding tank. The analysis is based on three dimensional numerical modelling solving the Navier-Stokes equation extended by the k-ε turbulence model. The free surface water-air interaction is handled by the Volume of Fluid method. Several scenarios for different boundary conditions concerning the flushing device have been tested. To evaluate the cleaning efficiency it was very important to investigate the shear stresses created by the flush wave. It could be shown that the influence of the initial condition is less important for long-term purifications. The length of the channel which could be cleaned by a flush wave depends predominantly on the flushing volume and its ratio to the dam height. According to this investigation flush wave cleaning is a good alternative for cleaning of a stormwater holding tank of 350 m length compared to classical more etablished methods. |
| Freie Schlagworte: | Flushing; numerical modelling; sewer cleansing; shear stress |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau > Fachgebiet für Strömungsdynamik (fdy) 16 Fachbereich Maschinenbau |
| Hinterlegungsdatum: | 02 Sep 2011 13:13 |
| Letzte Änderung: | 08 Okt 2014 08:00 |
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