Bubble-water mass transfer from plunging jet spillways

J. S. Gulliver, J. Groeneveld

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Spillway discharge at the spillways discharging as a free jet has been shown to produce high Total Dissolved Gas (TDG) concentrations in the tailwater of the spillway and the river reach downstream. HighTDGconcentrations can cause gas bubble disease in fish, and therefore is a negative environmental impact to be avoided. One challenge is that there are many unknown factors for a large free jet discharging into a pool, such as air entrainment, bubble size, rate of bubble-water transfer, and free surface transfer. Our approach has been to assume that the air entrained into the pool by the spillway and tunnel is sufficient to develop a steady state concentration of TDG, such that additional air entrainment would not alter this concentration. Thus, bubble-water desorption near the surface is balanced by absorption at deeper depths. The location of entrained air bubbles has been simulated with a computational fluid dynamics code. Gas transfer across the bubbles was then simulated with source/sink algorithms developed by the authors and applied to the bubbles. This paper will describe two predictions of TDG concentration and comparisons with field measurements.

Original languageEnglish (US)
Title of host publicationEnvironmental Hydraulics - Proceedings of the 6th International Symposium on Environmental Hydraulics
Pages735-740
Number of pages6
StatePublished - Dec 1 2010
Event6th International Symposium on Environmental Hydraulics - Athens, Greece
Duration: Jun 23 2010Jun 25 2010

Publication series

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

Other

Other6th International Symposium on Environmental Hydraulics
CountryGreece
CityAthens
Period6/23/106/25/10

Fingerprint Dive into the research topics of 'Bubble-water mass transfer from plunging jet spillways'. Together they form a unique fingerprint.

Cite this