Developments in mathematical simulation of fluid flow in building drainage systems

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Abstract

A mathematical model utilising the Method of Characteristics to solve the equations of continuity and momentum in a finite difference scheme forms a computer based simulation package (AIRNET). It can simulate conditions in building drainage, waste and vent (DWV) systems. Recent work extended AIRNET by including the effects of detergents and temperature. Other work examined the motive force of the water, extending it to include a proportion of the discharge appearing as droplets falling in the central air core as opposed to assuming it was due entirely to an annular film. This paper includes these additions and links to previous work on non dimensional analysis, to yield a more refined AIRNET model which includes the effects of detergents, temperature and droplet fraction. Significant refinement of the AIRNET model is described in this paper.
Original languageEnglish
Pages (from-to)307-317
Number of pages11
JournalBuilding Services Engineering Research and Technology
Volume33
Issue number3
Early online date18 Nov 2011
DOIs
Publication statusPublished - 1 Aug 2012

Keywords

  • mathematical model
  • fluid mechanics

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