by Esteban Ferrer
E Ferrer and RHJ Willden, In Proceedings 9h European Wave and Tidal Energy Conference (EWTEC-2011), September 2011, Southampton (UK)
We present a newly developed unstructured highorder
h/p Discontinuous Galerkin Finite Element solver forthe... more
We present a newly developed unstructured highorder
h/p Discontinuous Galerkin Finite Element solver forthe computation of tidal turbine hydrodynamics. The solverallows for accurate flow solutions of the two dimensional incom-pressible Navier-Stokes equations on hybrid meshes (triangular-quadrilateral) with rotating geometries using sliding mesh in-terfaces. High accuracy is obtained by enabling arbitrary poly-nomial orders within each mesh element allowing mesh sizerefinement (h-refinement) and/or polynomial enrichment (p
-refinement).The solver is validated for static NACA0012 and NACA0015airfoil flows for a range of Reynolds numbers including laminarand turbulent regimes. Results for a typical cross-flow tidalturbine are also included for laminar flows and the resulting flowphysics explored. Wake-blade interference effects are analysedfor single and three bladed turbines. Results for a three bladedturbine under ducted conditions (tidal fence concept) are alsoreported.We show that the solver provides accurate results and is thus avaluable tool to accurately predict flows through cross-flow tidalturbine devices and to explore their hydrodynamics.
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