Computational simulation of round thermal jets in an ambient cross flow using a large-scale hydrodynamic model. Issue 6 (9th November 2020)

• Record Type: Journal Article
• Authors: Malcangio, Daniela; Cuthbertson, Alan; Meftah, Mouldi Ben; Mossa, Michele
• Is Part Of: Journal of hydraulic research. Volume 58:Issue 6(2020)
• Page Start: 920
• Page End: 937
• Publication Date: 2020-11-09
• Subjects: Dispersion processes and models -- laboratory studies -- numerical simulations -- RANS models -- turbulent jets -- velocity and temperature measurements; Hydraulics -- Research -- Periodicals; Hydraulic engineering -- Periodicals; Hydraulic engineering; Electronic journals; Periodicals; 621.2
• DOI: 10.1080/00221686.2019.1684392
• Languages: English
• ISSNs: 0022-1686

Abstract

Abstract : This paper presents the numerical simulation of single, circular, turbulent, thermal jets discharged into an ambient fluid body with a uniform cross flow. The study utilizes a 3D hydrodynamic model to predict the dynamics of the evolving jets, with the model simulations calibrated against benchmark laboratory experimental datasets. Within the numerical-experimental model comparisons, the mean centreline temperature and velocity fields of the evolving jets are investigated in order to understand and predict the jet diffusion characteristics within the flowing ambient fluid body. Direct comparison between the numerical model predictions and laboratory datasets reveals that, with appropriate parameterization of the mixing processes and the selection of an appropriate numerical grid resolution, the large-scale hydrodynamic model can simulate both the near- and far-field thermal jet behaviour with good overall agreement, thus revealing a valid modelling tool used by environmental regulators for assessing the conformity of water quality of marine wastewater discharges.