00000nam 2200000za 4500 9.856785 CaOODSP 20221107155619 cr ||||||||||| 180518s2018 oncad #ob f000 0 eng d CaOODSP eng eng fre n-cn--- D68-2/200-2017E-PDF Bettle, Mark C. Baseline predictions of BB2 submarine hydrodynamics for the NATO AVT-301 collaborative exercise [electronic resource] / Mark C. Bettle, DRDC - Atlantic Research Centre. [Ottawa?] : Defence Research and Development Canada, 2018. viii, 42, [2] p. : ill., graphs Scientific report ; DRDC-RDDC-2017-R200 Title from cover. "Can unclassified." "March 2018." Includes bibliographical references. "Initial predictions of the hydrodynamic loads and flow field for the generic BB2 submarine model were computed using the commercial viscous flow solver ANSYS CFX with the Baseline Reynolds stress turbulence model (BSL-RSM). A block structured mesh having 37 x10⁶ cells was created for this purpose. Calculations were performed at a Reynolds number of 9.57 x10⁶ for steady translation with zero flow incidence and at a drift angle of 10°. A strategy of alternating between large and small timesteps was found to be useful for converging the fluid equations for the wide range in time and length scales of vortices in the flow. The primary flow features around the BB2, such as junction vortices and appendage tip vortices, have been identified to guide future mesh improvements"--Abstract, p. i. Includes abstract in French. gccst Submarines gccst Forecasting Hydrodynamics Defence R&D Canada. Atlantic Research Centre. Scientific report (Defence R&D Canada) DRDC-RDDC-2017-R200. (CaOODSP)9.802305 PDF 8.47 MB https://publications.gc.ca/collections/collection_2018/rddc-drdc/D68-2-200-2017-eng.pdf