A multi-component two-phase flow algorithm for use in landfill processes modelling
A multi-component two-phase flow algorithm for use in landfill processes modelling
This paper describes the finite difference algorithm that has been developed for the flow sub-model of the University of Southampton landfill degradation and transport model LDAT. The liquid and gas phase flow components are first decoupled from the solid phase of the full multi-phase, multi-component landfill process constitutive equations and are then rearranged into a format that can be applied as a calculation procedure within the framework of a three dimensional array of finite difference rectangular elements.
The algorithm contains a source term which accommodates the non-flow landfill processes of degradation, gas solubility, and leachate chemical equilibrium, sub-models that have been described in (White and Beaven 2013).
The paper includes an illustration of the application of the flow sub-model in the context of the leachate recirculation tests carried out at the Beddington landfill project. This illustration demonstrates the ability of the sub-model to track movement in the gas phase as well as the liquid phase, and to simulate multi-directional flow patterns that are different in each of the phases.
landfill, modelling, gas, leachate, recirculation, degradation
1644-1656
White, J.K.
58e029ac-c8fd-49fc-83b3-6f55f9312434
Nayagum, D.
b298fd1b-b5b3-498d-a184-76bae5d260fb
Beaven, R.P.
5893d749-f03c-4c55-b9c9-e90f00a32b57
September 2014
White, J.K.
58e029ac-c8fd-49fc-83b3-6f55f9312434
Nayagum, D.
b298fd1b-b5b3-498d-a184-76bae5d260fb
Beaven, R.P.
5893d749-f03c-4c55-b9c9-e90f00a32b57
White, J.K., Nayagum, D. and Beaven, R.P.
(2014)
A multi-component two-phase flow algorithm for use in landfill processes modelling.
Waste Management, 34 (9), .
(doi:10.1016/j.wasman.2014.05.005).
Abstract
This paper describes the finite difference algorithm that has been developed for the flow sub-model of the University of Southampton landfill degradation and transport model LDAT. The liquid and gas phase flow components are first decoupled from the solid phase of the full multi-phase, multi-component landfill process constitutive equations and are then rearranged into a format that can be applied as a calculation procedure within the framework of a three dimensional array of finite difference rectangular elements.
The algorithm contains a source term which accommodates the non-flow landfill processes of degradation, gas solubility, and leachate chemical equilibrium, sub-models that have been described in (White and Beaven 2013).
The paper includes an illustration of the application of the flow sub-model in the context of the leachate recirculation tests carried out at the Beddington landfill project. This illustration demonstrates the ability of the sub-model to track movement in the gas phase as well as the liquid phase, and to simulate multi-directional flow patterns that are different in each of the phases.
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e-pub ahead of print date: 9 June 2014
Published date: September 2014
Keywords:
landfill, modelling, gas, leachate, recirculation, degradation
Organisations:
Infrastructure Group
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Local EPrints ID: 364177
URI: http://eprints.soton.ac.uk/id/eprint/364177
ISSN: 0956-053X
PURE UUID: 394ce72d-4887-42c8-9772-2e21e7cc3094
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Date deposited: 08 Apr 2014 10:52
Last modified: 15 Mar 2024 02:53
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Author:
J.K. White
Author:
D. Nayagum
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