Numerical investigation of the behaviour of jets in a wave environment

• Published in: Journal of hydraulic research 2020-06, Vol.58 (4), p.618-627
• Main Authors: De Padova, Diana, Mossa, Michele, Sibilla, Stefano
• Format: Article
• Language: English
• Subjects: Compressibility; Computational fluid dynamics; Fluid flow; Free surfaces; Hydrodynamics; Intermediate water; Intermediate water masses; Jet aircraft; jet-wave interaction; Jets; Mechanics; Nozzles; physical modelling; Regular waves; Smooth particle hydrodynamics; smoothed particle hydrodynamics models; Velocity; wave; Wave motion; Wave period; Wave trains; Waves
• ISSN: 0022-1686; 1814-2079
• DOI: 10.1080/00221686.2019.1647886

This paper presents the application of a weakly compressible smoothed particle hydrodynamics model to study plane jets propagating into a still ambient and into a flow field of regular waves. The present study includes a comparative investigation of the main fluid mechanics characteristics in cases of jet discharged either in still water or transversally to regular wave trains characterized by different periods. Concerning jets in a wave environment, the present study shows the existence of the following three different regions of the jet-wave field starting from the nozzle in the intermediate water: the nearest region to the nozzle where the jet motion dominates the wave motion; the intermediate region, where the horizontal velocity component of wave motion dominates the jet centreline velocity decay; and the nearest region to the free surface where the wave period dominates the jet motion. The present study shows the differences found numerically between each flow region.