A new approach to modelling initial dilution of a buoyancy-dominated jet in moving water. Issue 2 (1st March 2002)

• Record Type: Journal Article
• Authors: Lye, L M; Sharp, J J
• Is Part Of: Journal of environmental engineering and science. Volume 1:Issue 2(2002)
• Page Start: 101
• Page End: 111
• Publication Date: 2002-03-01
• Subjects: forced entrainment; -- buoyant jets; -- asymptotic solutions; -- ocean outfalls; -- initial dilution; Environmental engineering -- Periodicals; Sanitary engineering -- Periodicals; Environmental engineering -- Canada -- Periodicals; Environnement, Technique de l' -- Périodiques; Technique sanitaire -- Périodiques; Environnement, Technique de l' -- Canada -- Périodiques; Environmental engineering; Sanitary engineering; Canada; Electronic journals; Computer network resources; Periodicals; 628.05
• DOI: 10.1139/s02-005
• Languages: English
• ISSNs: 1496-2551

Abstract

Abstract : Initial dilution is one of the most important measures in the design of ocean outfalls. Considerable efforts have been devoted in the past to modelling initial dilution of a buoyancy-dominated jet in moving water. This paper reviews available initial dilution models and presents a new modelling approach based on a length scale analysis combined with an additive entrainment hypothesis, and nonlinear regression modelling. The proposed approach is more systematic and more justifiable than existing methods for two reasons: (1) it uses an objective measure to evaluate the model and (2) it includes the effect of ambient current in the buoyancy-dominated near field (BDNF). Using available experimental data, a new, continuous, initial dilution model is proposed and compared with presently available models. The proposed model is presented in both deterministic and probabilistic form.