Local Flow around a Surface Combatant at Various Static Drift Conditions: The Role Played by Turbulence Closures

M Visonneau (1) , E Guilmineau (1) , G Rubino (1)

1 LHEEA - Laboratoire de recherche en Hydrodynamique, Énergétique et Environnement Atmosphérique

This paper presents a local and global computational study of the flow around the US Navy frigate DTMB 5415 at 10 • and 20 • static drift conditions. A thorough validation study comparing isotropic k − ω SST, Reynolds-Stress Transport SSG/LRR statistical closures and the unsteady hybrid RANS-LES DDES-SST model is conducted for the two static drift configurations. This validation study includes global forces/moment comparison and detailed local comparisons with IIHR TPIV experiments. All these validations are conducted on very fine unstructured grids comprised of 163M to 184M cells with local boxes of refinement in the cores of the main vortices. For both incidences, this paper establishes that the hybrid RANS/LES turbulence model is the only closure able to capture all the physical characteristics of the flow in the core of the vortices of interest.

Domaines: Mécanique des fluides [physics.class-ph]; Mécanique des fluides [physics.class-ph]; Mécanique des structures [physics.class-ph]; Mécanique des structures [physics.class-ph]; Analyse numérique [math.NA]; Calcul parallèle, distribué et partagé [cs.DC]

M Visonneau, E Guilmineau, G Rubino. Local Flow around a Surface Combatant at Various Static Drift Conditions: The Role Played by Turbulence Closures. 33rd Symposium on Naval Hydrodynamics, Oct 2020, Osaka (Online), Japan. ⟨hal-03027397⟩