ARTICLE | doi:10.20944/preprints202011.0432.v1
Subject: Engineering, Marine Engineering Keywords: Stratified Wakes; Turbulence; RANS; Secont-Moment Closure; Stress-transport
Online: 16 November 2020 (15:40:25 CET)
The problem of simulating wakes in a stratified oceanic environment with active background turbulence is considered. Anisotropic RANS turbulence models are tested against laboratory and eddy-resolving models of the problem. An important aspect of our work is to acknowledge that the environment is not quiescent; therefore, additional sources are included in the models to provide a non-zero background turbulence. The RANS models are found to reproduce some key features from the eddy-resolving and laboratory descriptions of the problem. Tests using the freestream sources show the intuitive result that background turbulence causes more rapid wake growth and decay.