Near field mixing process of multi-port diffusers: Numerical modelling with quadtree grids

N. Q. Chien*, S. K. Tan

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference Proceeding (Non-Journal item)

Abstract

A two-dimensional vertical (2-DV) model has been set up to simulate the flow and concentration field of a merged plume emitted from a multiport diffuser. In our application, two quadtree grids were employed; one for the flow field, and the other for concentration of the solute. The quadtree grids allow refinement for hydrodynamic modelling at the proximity of the port outlet, and concentration-at the interface between the plume and ambient water. In the test with stagnant ambient water, the computed velocity and concentration widths of plume expand at a slower rate compared to those calculated from analytical formulae; the difference between simulation result and formulae for centre line velocity and for concentration are 16% and 7%, respectively. In the test with uniform ambient crossflow, the simulated trajectory is higher than that computed with DKHW, and the simulated dilution ratios are lower than those of CorMix and DKHW.

Original languageEnglish
Title of host publicationEnvironmental Hydraulics - Proceedings of the 6th International Symposium on Environmental Hydraulics
PublisherTaylor & Francis
Pages1027-1032
Number of pages6
ISBN (Print)9780415595469
Publication statusPublished - 2010
Event6th International Symposium on Environmental Hydraulics - Athens, Greece
Duration: 23 Jun 201025 Jun 2010

Publication series

NameEnvironmental Hydraulics - Proceedings of the 6th International Symposium on Environmental Hydraulics
Volume2

Conference

Conference6th International Symposium on Environmental Hydraulics
Country/TerritoryGreece
CityAthens
Period23 Jun 201025 Jun 2010

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