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You are here : eLibrary : IAHR World Congress Proceedings : 32nd Congress - Venice (2007) : THEME B: Data Acquisition and Processing For Scientific Knowledge and Public Awareness. : Residence time distribution and dispersion in a contact tank
Residence time distribution and dispersion in a contact tank
Author : Carlo Gualtieri, Guelfo Pulci Doria
Historically, contact tanks have been designed by empirical correlation, physical model studies, or tracer studies conducted after the contact tank has been built. Recently, computation fluid dynamics (CFD) models have been applied to investigate flow and solute transport in disinfection tanks. The objective of the paper is to present the preliminary results of a numerical study undertaken to investigate hydrodynamics and turbulent transport and mixing inside a contact tank. Flow field was obtained using standard k-ε model. Tracer transport was analyzed in the cases of a pulse release using the advection-diffusion equation. Transient concentration data were used to derive residence time distribution (RTD) function for the tank in order to evaluate its performance. Finally, dispersion coefficients were computed for the tank and they were finally related to the standard deviation of the crosssectional profile of longitudinal velocity inside the tank.
File Size : 639,404 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 32nd Congress - Venice (2007)
Article : THEME B: Data Acquisition and Processing For Scientific Knowledge and Public Awareness.
Date Published : 01/07/2007
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