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Acadlore takes over the publication of IJCMEM from 2025 Vol. 13, No. 3. The preceding volumes were published under a CC BY 4.0 license by the previous owner, and displayed here as agreed between Acadlore and the previous owner. ✯ : This issue/volume is not published by Acadlore.

Open Access
Research article

nvestigation of Residence Time Distribution and Local Mean Age of Fluid to Determine Dead-Zones in Flow Field

t. karches,
k. buzas
Department of Sanitary and Environmental Engineering, Budapest University of Technology and Economics, Hungary
International Journal of Computational Methods and Experimental Measurements
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Volume 1, Issue 2, 2013
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Pages 132-141
Received: N/A,
Revised: N/A,
Accepted: N/A,
Available online: N/A
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Abstract:

Residence time and local mean age of fluid are important parameters of the fluid flow, with which we are able to detect the functioning and non-functioning zones. It is a novel approach to estimate the effect of dead-zones on chemical and biological processes. In this paper, we introduce a numerical tracer study, which is calibrated by field measurements and which is applied in different cases such as settling tank and aeration tank of wastewater treatment. Using an advective-diffusive passive scalar transport equation, the age of the fluid can be calculated. It also shows the short-circuits and dead-zones of the fluid and this corresponds with our observations. This method helps eliminate potential hydraulic problems at the early stage of design.

Keywords: CFD, dead-zone, local mean age, tracer study
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Karches, T. & Buzas, K. (2013). nvestigation of Residence Time Distribution and Local Mean Age of Fluid to Determine Dead-Zones in Flow Field. Int. J. Comput. Methods Exp. Meas., 1(2), 132-141. https://doi.org/10.2495/CMEM-V1-N2-132-141
T. Karches and K. Buzas, "nvestigation of Residence Time Distribution and Local Mean Age of Fluid to Determine Dead-Zones in Flow Field," Int. J. Comput. Methods Exp. Meas., vol. 1, no. 2, pp. 132-141, 2013. https://doi.org/10.2495/CMEM-V1-N2-132-141
@research-article{Karches2013NvestigationOR,
title={nvestigation of Residence Time Distribution and Local Mean Age of Fluid to Determine Dead-Zones in Flow Field},
author={T. Karches and K. Buzas},
journal={International Journal of Computational Methods and Experimental Measurements},
year={2013},
page={132-141},
doi={https://doi.org/10.2495/CMEM-V1-N2-132-141}
}
T. Karches, et al. "nvestigation of Residence Time Distribution and Local Mean Age of Fluid to Determine Dead-Zones in Flow Field." International Journal of Computational Methods and Experimental Measurements, v 1, pp 132-141. doi: https://doi.org/10.2495/CMEM-V1-N2-132-141
T. Karches and K. Buzas. "nvestigation of Residence Time Distribution and Local Mean Age of Fluid to Determine Dead-Zones in Flow Field." International Journal of Computational Methods and Experimental Measurements, 1, (2013): 132-141. doi: https://doi.org/10.2495/CMEM-V1-N2-132-141
Karches T.， Buzas K.. nvestigation of Residence Time Distribution and Local Mean Age of Fluid to Determine Dead-Zones in Flow Field[J]. International Journal of Computational Methods and Experimental Measurements， 2013， 1(2)： 132-141. https://doi.org/10.2495/CMEM-V1-N2-132-141